Journal of Energy Chemistry
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2022
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IF 13.599
Qi Ye,Haoyue Liang,Shuhao Wang,Can Cui,Cheng Zeng,Tianyou Zhai,Huiqiao Li
Poly (ethylene oxide) (PEO)-based solid polymer electrolyte is always the most promising candidate for preparing thinner, lighter and safer lithium-ion batteries. However, the lithium dendrites growth of lithium anode and the high-voltage oxidation of cathode are easy to cause the PEO-based battery failure. The way to deal with the different challenges on both sides of the anode and cathode is pursued all the time. In this study, we reported a new strategy to construct the PVDF/PEO/PVDF three-layer structure for solid polymer electrolyte (marked as PVDF@PEO) using PVDF as the functional “skin”. The PVDF@PEO electrolyte can effectively prevent from the lithium dendrites, and shows a stable cycling life over 1000 h in the Li/PVDF@PEO/Li cell. In addition, the PVDF@PEO electrolyte exhibits higher oxidation resistance and can be matched with high-voltage LiCoO 2 cathode. The Li/PVDF@PEO/ LiCoO 2 cell delivered a specific capacity of about 150 mAh g −1 over 150 cycles and maintained good cycling stability. Our research provides insights that the polymer electrolytes constructed with PVDF functional “skin” can simultaneously meet the challenges of both anode and cathode in solid-state lithium-ion batteries (SSLIBs).
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Lejie Xu,Dong Shi,Guangguang Yang,Gang Chen,Fugen Song,Yuze Zhang,Shaolei Xie,Xiaowu Peng,Licheng Zhang,Yuxuan Wang,Yong Niu,Lijuan Li,Lianmin Ji
Neutral organic phosphate/FeCl 3 systems are widely employed for lithium extraction from high Mg/Li ratio brines; however, extractant degradation under prolonged operational conditions constrains process sustainability. This study investigates the degradation behavior of tributyl phosphate (TBP) and trioctyl phosphate (TOP) during lithium extraction, examining the influence of key process parameters (HCl/NaOH concentration, temperature, and FeCl 3 concentration) and evaluating the impact of degradation products on extraction performance. Single-factor experiments demonstrated that TOP exhibited superior stability compared to TBP, attributable to its longer carbon chains and greater steric hindrance. Both extractants displayed poorer acid resistance, whereas elevated FeCl 3 concentrations significantly suppressed degradation. On the basis of these findings, optimal process conditions are recommended: minimal HCl usage, NaOH concentration ≤ 4.0 mol·L −1 , and temperature ≤ 35 °C. Qualitative and quantitative 31 P NMR analyses confirmed that the primary degradation product of TBP was dibutyl phosphate (DBP), while that of TOP was di-(2-ethylhexyl) phosphoric acid (D2EHPA). Subsequent single-stage extraction experiments revealed that both DBP and D2EHPA diminished lithium extraction efficiency and Li/Mg separation factors, with D2EHPA exerting a more pronounced adverse effect. Across the concentration range of 0–0.5 mol·L −1 , D2EHPA reduced lithium extraction efficiency by 20%, compared to an 11% decrease caused by DBP. This study addresses a critical gap in understanding how extractant degradation affects long-term lithium extraction performance, and supplies feasible operational limits and formulation references for the industrial design and steady running of lithium separation processes.
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高影响因子
HYDROMETALLURGY
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2026
·
IF 6.3
Zhengqin Zhang,Zheng Li,Longsheng Zhao,Bowen Wang,Zongyu Feng,Xiaowei Huang
Synergistic extraction mechanism in TBP system was investigated. • Synergistic extraction system performs better at low lithium concentration. • TBP-DEC system exhibits higher β Li/Mg than other synergistic systems. • Reducing O's electric potential in C O of synergistic agents enhance lithium selectivity. This study investigates the extraction and selective separation of Li from solutions with a high Mg/Li ratio based on a synergistic extractant system involving tributyl phosphate (TBP). Different synergistic agents were investigated, including ethyl acetate (EA), butyl acetate (BA), diethyl carbonate (DEC), methyl isobutyl ketone (MIBK), N,N-Diethylacetamide and N,N-di(1-methylheptyl)acetamide (N503). The result showed that TBP-DEC synergistic extraction system achieved the highest lithium extraction rate of 71.4% and lithium magnesium separation factor of 160, when the concentration of Li = 0.50 g/L and Mg/Li ratio = 200. Fourier Transform Infrared Spectroscopy (FT-IR) analysis revealed that TBP acted as the primary extraction agent for lithium extraction, while the O atom in the C O group of the synergistic agent participates in coordination with lithium. Additionally, the lithium extraction rate of the synergistic extractant system increased with the integrated peak area of the P O stretching vibration. Mechanism analysis reveals that increase of the negative charge density on the O atom in the C O group and reduction of the intermolecular steric hindrance of the synergistic agent can enhance the lithium selectivity of TBP.
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高影响因子
PROGRESS IN SOLID STATE CHEMISTRY
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2026
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IF 9.7
Yutong Wang,Hang Zhao,Jiayin Niu,Anurak Weahayee,Wanwisa Limphirat,Theeranun Siritanon,Jingyi Ren,Peng Jiang,Yanfei Sun,Tingting Lu
The development of high-performance narrowband near-infrared second window (NIR-II) phosphors remains a critical challenge in the fields of advanced bioimaging and optical thermometry. Herein, a series of Mn 5+ -doped ABaPO 4 (A = Li, Na, K) phosphors are synthesized via conventional solid-state method, and the effect of A-site alkali metal cations on their crystal structure and luminescence properties is comparatively investigated. Mn K -edge X-ray absorption near-edge structure (XANES) spectroscopy unambiguously confirms that Mn ions are predominantly stabilized in the +5 oxidation state and exclusively occupy tetrahedral [PO 4 ] sites in all three hosts. All samples exhibit characteristic narrowband NIR-II emission in the 1160-1200 nm range originating from the 1 E → 3 A 2 spin-forbidden transition of Mn 5+ . The lattice distortion induced by different A-site cations significantly modulates the doping limit, crystal field strength, thermal stability and temperature sensing performance of Mn 5+ ions. All three Mn 5+ -doped hosts exhibit good thermal stability. The fluorescence decay lifetime of LiBaPO 4 : Mn 5+ reaches 772.436 μs NaBaPO 4 : Mn 5+ shows unique energy level splitting and achieves a maximum relative temperature sensitivity of 2.43% K −1 based on the fluorescence intensity ratio technique. KBaPO 4 : Mn 5+ possesses a highly symmetric crystal lattice and a higher doping limit, with a thermal quenching activation energy ( ΔE ) of 0.414 eV. This work not only provides three promising NIR-II phosphors for bioimaging and optical thermometry, but also offers new insights into the research of Mn 5+ -activated phosphate systems.
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高影响因子
DESALINATION
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2026
·
IF 9.9
Yingying Dong,Jun Wei,Xinyu Ma,Shuwei Jia,Fengrui Yang,Zhi Wang
A novel bis-quaternary ammonium salt was synthesized. • The bis-quaternary ammonium salt was used as an aqueous co-monomer to enhance the size sieving and charge exclusion effects of the nanofiltration membrane. • The Li + /Mg 2+ separation factor of the optimized membrane reached 73.3, which is 5.4 times that of the pristine membrane. Efficient separation of Li + and Mg 2+ from salt lakes is important for the application and recovery of lithium resources. In this work, a novel bis-quaternary ammonium salt (QTMPDA) was synthesized and utilized as a co-monomer in the polyethyleneimine aqueous solution for interfacial polymerization (IP), synergistically regulating the pore structure and surface charge of the nanofiltration membrane and improving its Li + /Mg 2+ separation performance. The QTMPDA monomer features a linear short-chain diamino structure, enabling it to participate in the IP, increase the crosslinking density of the polyamide network, and form a more concentrated pore size distribution, thereby enhancing the membrane's size sieving effect. Meanwhile, the two quaternary ammonium cations in QTMPDA can effectively increase the membrane surface electropositivity, strengthening the electrostatic repulsion of Mg 2+ . Relative to the unmodified membrane, the zeta potential of the optimized membrane was elevated from −5.9 mV to 20.2 mV at pH 7 and the MgCl 2 rejection was increased from 93.3% to 99.2%. Moreover, the membrane demonstrated an excellent Li + /Mg 2+ separation factor of 73.3 (mass ratio of Mg 2+ /Li + = 100). This work offers a novel approach for regulating IP process via functional aqueous co-monomers to optimize membrane structure and performance. Download: Download high-res image (139KB) Download: Download full-size image
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高影响因子
Energy Technology
·
2026
·Vol. 14
·期 4
·e202502131
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IF 3.6
Xiongwu Dong,Weixuan Chen,Liang Chen,Bao Qiu,Xufeng Zhou,Zhaoping Liu
Owning to the low cost and eco-friendliness, water-based method for the fabrication of electrode films is attractive for Li-ion battery industry. Several drawbacks such as sluggish kinetics, crack, and nonuniformity should be overcome before its practical application for anode and cathode electrodes. Herein, a modified water-based method based on carboxymethyl cellulose/styrene-butadiene rubber as binder has been established for the successful fabrication of Li-rich layered oxide (LLO) electrode films without crack. As the additives of aqueous slurry, acetic acid (HAc) can inhibit the corrosion of Al foil, while ethylene carbonate can reduce the surface tension of slurry and alleviate the capillary pressure during drying. Thick LLO electrode films with a high mass loading up to 40 mg cm −2 (area capacity > 9 mAh cm −2 ) can be achieved. Such films have good peeling strength and flexibility that can avoid the removal of active layers from Al foils under the practical operations. Multilayer pouch cells consisted of graphite anode and LLO cathode by the modified water-based method display excellent electrochemical performances. A 2.4 Ah pouch cell can deliver an energy density of 240 Wh kg −1 and show a high capacity retention of 90.5% after 500 cycles at C/2.
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高影响因子
ACS Applied Materials & Interfaces
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2026
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IF 7.8
Zhiyong Bao,Zhijun Peng,Fujun Chang,Jiewu Cui,Juan Li,Xin Yao,Jun Lv,Guangqing Xu,Jiyan Dai,Yucheng Wu
The practical implementation of lithium–sulfur (Li–S) batteries is still impeded by two fundamental challenges: the low conductivity of lithium sulfide species (Li2S2/Li2S) and the shuttling of soluble lithium polysulfides (LiPSs). To tackle these issues, we propose an efficient polysulfide regulation strategy via a functional separator coated with Bi2Se3@NiSe2 heterostructures anchored on nitrogen-doped carbon nanotubes (N-CNTs). The rationally constructed Bi2Se3@NiSe2 interfaces not only offer strong chemisorption toward LiPSs but also act as highly active electrocatalysts to facilitate their conversion kinetics, particularly the nucleation and decomposition of Li2S. Coupled with the three-dimensional conductive network of N-CNTs, which ensures rapid electron/ion transport, the designed separator significantly suppresses the shuttle effect and enhances redox efficiency. As a result, Li–S batteries equipped with the Bi2Se3@NiSe2/N-CNT-modified separator achieve a remarkable initial discharge capacity of 1418.24 mAh g–1 at 0.1 C and outstanding long-term cyclability with a minimal decay rate of 0.083% per cycle over 500 cycles at 1 C. In situ X-ray diffraction further verifies the reversible phase evolution between α-S8 and Li2S during cycling. This work highlights the potential of bimetallic selenide heterostructures as multifunctional catalytic interlayers and provides a feasible pathway toward advanced separators for durable Li–S batteries.
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PubMed
高影响因子
Journal of Cleaner Production
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2026
·
IF 10.7
Wensen Liu,Hui Su,Xiaolin Peng,Zeng Wei,Lanxuan Wei,Zhaowu Zhu
Pyridinecarboxamide PA14 recovers Ni and Co from chloride media via a solvation mechanism without alkali addition. • Continuous countercurrent extraction (6 EX + 6 SC + 7 ST) achieves >99% recovery for both Ni and Co over 480 h. • Strip liquor contains 79 g/L Ni and 32 g/L Co, meeting battery-grade specs after D2EHPA purification. • PA14 exhibits outstanding stability over 800 h with no degradation, capacity loss, or metal poisoning. Efficient and alkali-free recovery of nickel (Ni) and cobalt (Co) from spent lithium-ion batteries remains a significant challenge in chloride-based hydrometallurgy, primarily due to the poor extractability of Ni 2+ and the severe emulsification issues encountered during practical operation. To address these limitations, this study introduces a novel pyridinecarboxamide-based (PA14) extraction system, featuring an elongated alkyl side chain that substantially enhances the oil solubility of extracted metal complexes and effectively eliminates emulsification. A continuous countercurrent extraction system comprising six extraction, six scrubbing, and seven stripping stages was developed and operated for over 480 h using real industrial leach liquor from spent NCM523 cathode materials. The system achieved over 99% recovery for both Ni and Co, yielding a strip liquor with 79 g/L Ni and 32 g/L Co, which, after di-(2-ethylhexyl) phosphoric acid (D2EHPA) purification, met battery-grade impurity specifications. Systematic parameter evaluation revealed that Fe(III) is co-extracted and migrates to the product stream, necessitating upstream removal or side-stream bleeding; feed acidity must be controlled below 0.1 mol/L to prevent protonation-induced emulsification; and elevated temperatures improve phase disengagement but reduce extraction efficiency, effects that are readily compensated by multistage configuration. Notably, the PA14 extractant demonstrated exceptional long-term stability over 800 h of continuous operation, with no detectable degradation, loss of extraction capacity, or metal poisoning. This work provides a complete, practical, and sustainable engineering solution for the clean recovery of valuable metals from spent NCM batteries, overcoming the bottlenecks of both extractability and process stability that have hindered prior chloride-based approaches. Download: Download high-res image (340KB) Download: Download full-size image
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高影响因子
RARE METALS
·
2026
·Vol. 45
·期 4
·e70197
·
IF 12.1
Bingbo Ni,Qingling Ruan,Lei Wang,Yuanchun Zou,Guangyin Li
en The dual challenges of environmental sustainability and rising energy needs underscore the necessity for high-energy-density batteries, making lithium–sulfur (LSB) systems with their high theoretical capacity highly attractive. However, the polysulfide shuttle, coupled with inherent kinetic limitations in the sulfur reduction reaction, significantly compromises the battery's commercialization. Utilizing biomass-derived materials presents a sustainable and cost-effective approach to mitigating these issues. Therefore, in this study, a series of cobalt–nitrogen co-doped porous carbon materials (Co,N-C) were prepared from ramie waste glue by adjusting the cobalt source content, and their electrochemical properties as sulfur hosts were systematically investigated. Among them, Co,N-C-2 exhibits the best performance. The three-dimensional (3D) porous architecture promotes electrolyte penetration and lithium–ion mobility, whereas the Co,N co-doping sites effectively adsorb lithium polysulfides, markedly reducing the shuttle effect and improving conversion kinetics. The Co,N-C-2/S cathode has an initial discharge capacity of 1274.2 mAh g −1 at 0.2C and sustains a reversible capacity of 540.6 mAh g −1 after 350 cycles at 1C, demonstrating a minimal degradation rate of 0.11% each cycle. This study offers a sustainable and cost-effective design strategy for high-performance LSBs. 摘要 zh 环境可持续性和不断增长的能源需求所带来的双重挑战凸显了高能量密度电池的必要性,这使得具有高理论容量的锂硫(LSB)电池系统极具吸引力。然而,多硫化物穿梭效应以及硫还原反应固有的动力学限制严重阻碍了该电池的商业化进程。利用生物质衍生材料为解决这些问题提供了一种可持续且经济有效的途径。因此,在本研究中,通过调整钴源含量,以苎麻废胶为原料制备了一系列钴氮共掺杂多孔碳材料(Co,N–C),并对其作为硫宿主的电化学性能进行了系统研究。其中,Co,N-C-2 表现最佳。三维(3D)多孔结构促进了电解质的渗透和锂离子的迁移,而钴氮共掺杂位点能有效吸附多硫化锂,显著减少了穿梭效应并改善了转化动力学。Co,N-C-2/S 正极在 0.2C 时的初始放电容量为 1274.2 mAh g −1 ,在 1C 下经过 350 次循环后仍能保持 540.6 mAh g −1 的可逆容量,每循环的容量衰减率仅为 0.11%。这项研究为高性能锂硫电池提供了一种可持续且经济的设计策略。
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Miaomiao Zhang,Zhen Dai,Yongqi Wang,Xuelei Li,Zhihui Xu,Qingwen Li,Aruuhan Bayaguud
LRNM/LIC delivers 253.4 mAh g⁻ 1 at 0.1 C, outperforming LRNM/LSPSC (168.5 mAh g⁻ 1 ). • LIC forms stable In 2 O 3 passivation layer, but LSPSC has irreversible side reactions. • VGCF enables LRNM/LIC/VGCF to retain 98.72% capacity after 100 cycles at 0.2 C. Cobalt-free lithium-rich manganese-based oxides have emerged as promising cathode materials for all-solid-state lithium batteries (ASSLBs) owing to their high energy density and cost efficiency. This study systematically evaluates the interfacial compatibility between the 0.3Li 2 MnO 2 ·0.7LiNi 0.5 Mn 0.5 O 2 (LRNM) cathode and two representative solid electrolytes—namely, the sulfide electrolyte Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 (LSPSC) and the halide electrolyte Li 3 InCl 6 (LIC). The LRNM/LIC cathode achieves a high specific discharge capacity of 253.4 mAh g −1 at 0.1 C, which considerably exceeds that of the LRNM/LSPSC cathode (168.5 mAh g −1 ). Moreover, the LRNM/LIC cathode retains 87.32% of its initial capacity after 100 cycles at 0.5 C, indicating excellent cycling stability. The main reason for this improvement is that LSPSC undergoes irreversible side reactions at the interface with LRNM, generating substances such as SO 4 2- , SO 3 2- , and polysulfides. By contrast, LIC reacts with LRNM to form a stable interface layer (In 2 O 3 passivation layer), which inhibits continuous interfacial side reactions and substantially enhances interface stability. Furthermore, the influence of different conductive agents (vapor-grown carbon fiber (VGCF), carbon nanotubes, and acetylene black) on the conductivity and interfacial stability of LRNM/LIC is explored. Results indicate that the cycling stability of the LRNM/LIC/VGCF cathode is enhanced, achieving a capacity retention rate of 98.72% at 0.2 C after 100 cycles because VGCF forms a continuous three-dimensional conductive network. This study provides valuable insights for the development of low-cost LRNM-based ASSLBs with high energy density. Download: Download high-res image (227KB) Download: Download full-size image
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高影响因子
DESALINATION
·
2026
·
IF 9.9
Jilong Han,Ruyi Shi,Mochi Li,Huanzhang Lu,Yijian Zheng,Pengfei Li,Jisheng Li
Dense LLTO-Al 2 O 3 membrane (∼20 μm) for /Li + from high Mg 2+ /Li + brine. • Optimised LLTO (x = 0.11, 1250 °C/6 h): tetragonal, 3.26 × 10 3 S/cm. • La-poor/La-rich enables 2D Li + transport; Mg 2+ blocked by size. • Intergranular defects are main pathway for Mg 2+ co-permeation. • Selectivity 16.06, 99.61% Mg 2+ rejection (6 h); energy 23.21 kW·h (24 h). To solve the problem of lithium extraction from salt lake brine with a high magnesium‑lithium ratio, a composite ceramic membrane electrodialysis technology based on perovskite-type superionic conductor Li 3x La 2/3-x TiO 3 (LLTO) was proposed. LLTO powder was synthesised by the sol-gel method. The lithium doping amount (x = 0.11), sintering temperature (1250 °C) and time (6 h) were systematically optimised to obtain tetragonal LLTO with high ionic conductivity (3.26 × 10 −3 S/cm). Then, the LLTO-Al 2 O 3 composite film was prepared by a spin coating process (PVA content of 20%, LLTO solid content of 0.08 g/mL, spin coating 10 times) with porous alumina as the substrate. After calcination at 1275 °C for 6 h, a dense film with a thickness of about 20 μm was formed. Molecular dynamics simulations show that the two-dimensional selective transport of Li can be realised in the LLTO inner layer based on the La-poor / La-rich alternating structure, while Mg 2+ is hindered by the size effect. Intergranular defects are the main pathway leading to the co-permeation of Mg 2+ . The electrodialysis experiment showed that the membrane had good selectivity (selectivity coefficient 16.06) and Mg 2+ rejection rate (99.61%) for Li at the initial stage of operation (6 h), and the energy consumption was 23.21 kWh after 24 h of electrodialysis. This study provides a reference for membrane material design, preparation process and transmission mechanism for lithium extraction from high magnesium‑lithium ratio brine, and has potential application value.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yiping Gu,Qi Wei,Yun Hong,Ze Ma,Zihua Wang,Tao Zhang,Xiaoyu She,Wei Lu
Composite polymer electrolytes (CPEs) based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) are regarded as promising electrolyte systems for developing high-energy-density solid-state lithium batteries. However, the combination of ceramic fillers and the polymer matrix often leads to poor lithium metal interface stability and limited ion transport. Here, we constructed phosphated LLZTO/PVDF-HFP CPEs synergistically regulated by a dual-salt (LiTFSI-LiBOB) and fluoroethylene carbonate (FEC). Surface phosphation of LLZTO reduces interfacial side reactions, LiBOB alleviates interfacial corrosion at the cathode/Al current collector, while FEC and dual-salt synergistically facilitate the formation of a robust SEI layer and suppress SN-induced nitrile polymerization side reactions. The electrolyte exhibits a wide electrochemical window (5.0 V), a low activation energy (0.285 eV), and an excellent Li + transference number (0.62). Besides, the assembled Li|PHL-DLi-FEC|Li cell exhibits the lifespan of over 1000 h at 0.2 mA cm −2 at both 25 °C and 60 °C. The assembled LiFePO 4 (LFP) |PHL-DLi-FEC|Li cell displays an initial capacity of 144.6 mAh g −1 , 91.9% capacity retention after 500 cycles under 0.5 C, and approaching 100% coulombic efficiency after 500 cycles at 1 C. This work offers new insights into composite polymer electrolytes with stable dual interfaces for solid-state batteries.
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高影响因子
危险品化学品经营许可证（带存储）