JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·487-492
·
IF 1.798
Zhang Xinxiu,Liu Jinsong,Zhu Kongjun,Wang Jing,Li Ziquan,Qiu Jinhao
High-quality lead-free piezoelectric x Mn-doped (K 0.48 Na 0.52 ) 0.985 Li 0.015 NbO 3 films (KNLN; x = 0, 0.01, 0.02, 0.03) were successfully deposited onto Pt(111)/Ti/SiO 2 /Si(100) substrates by sol–gel method. Effects of Mn substitution on the microstructure, dielectric properties, ferroelectric properties, and leakage current of the KNLN films were investigated in detail. Mn-doping can significantly improve the ferroelectric properties and decrease the leakage current of KNLN films. Optimal dielectric properties were obtained in films doped with 2 mol% Mn, whose dielectric constant and dielectric loss at 1 kHz were 875 and 0.030, respectively. In addition, well-saturated ferroelectric P - E hysteresis loop with large remanent polarization (2 P
r ) and coercive field ( E
c ) of 22.5 μC/cm 2 and 65 kV/cm were obtained in 2 mol% Mn-doped KNLN film at an applied electric field of 200 kV/cm.
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Xinyang Li,Jie Feng,Yanan Li,Na Li,Xin Jia,Yinshui Wang,Shujiang Ding
The inability to effectively inhibit the lithium (Li) dendrite growth is identified as the real culprit hindering the practical application of polyethylene oxide (PEO)-based electrolytes. Herein, a novel PEO composite electrolyte with ion rectifier is developed based on the cross-scale synergistic rectification strategy. At the micro-scale, the array structure of the ion rectifier suppresses the growth of PEO crystals and their distribution in the non-ionic conduction direction through space confinement, alleviating ion-migration crosstalk and enabling polymer chain rectification. Furthermore, the matrix contains abundant copper ions and oxygen-containing groups that inhibit anion conduction and accelerate Li + migration at the nanoscale, respectively, to achieve ion flow rectification. Implementing this strategy results in a uniform, fast, and stable Li + migration/diffusion behavior from the electrolyte to anode interface. The critical current density of the PEO electrolyte is increased to 2.5 mA cm −2 , indicating a significant improvement in dendrite growth inhibition. Impressively, the composite electrolytes exhibit long-term stability (>4000 h at 0.2 mA cm −2 ) and ultra-high current-density tolerance (>200 h at 1 mA cm −2 ). Moreover, the composite electrolytes enable stable cycling of high-area-capacity (3.11 mAh cm −2 , 20 mg cm −2 ) LiFePO 4 /Li pouch cells, highlighting the importance of this strategy for the practical application of PEO electrolytes.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Helin Wang,Weiwei Wu,Qiurong Jia,Ting Liu,Fu Liu,Min Zhang,Miao Bai,Shaowen Li,Xiaoyu Tang,Bin Gan,Yue Ma
The Si anodes suffer from the repetitive buildup of the solid electrolyte interphase, electrode pulverization upon the lithiation/delithiation process, as well as the Li trapping in the alloy intermediates. Herein, a facile electrostatic self-assembly process of the Si nanosheets (SiNS) and graphite microsheets (GMs) is proposed as a viable high-capacity composite anode. Upon the appropriate interfacial tailoring, the SiNS/GMs composite not only guarantees the intimate contact mode between the sand-milled Si nanosheets and the positively charged graphite sheets but also renders the enhanced electrode conductivity and high-rate performance (886.2 mAh g–1 at current density of 5 A g–1). In addition, the prelithiated SiNS/GMs (Pre-SiNS/GMs) are fabricated by spraying stabilized lithium metal powder (SLMP) at the predetermined amounts onto the electrodes, contributing to the improved initial Coulombic efficiency (ICE) of the half cell (99%). As the Pre-SiNS/GMs anodes are assembled with the diverse commercial cathodes, the full cell models reveal the balanced cycling endurance and the high gravimetric energy/power densities.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 43
·22598-22606
·
IF 8.867
Wenju Ren,Haibiao Chen,Rongxue Qiao,Yuan Lin,Feng Pan
It is critical to monitor the state of health (SOH) of the Li-ion batteries to ensure a safe operation and to extend the service life of the batteries in electric vehicles. In this work, we demonstrated that the equivalent capacitance (Cp) and resistance (Rp) of the electrode interface derived using a first-order RC equivalent circuit under a large galvanostatic pulse (LGPM) condition can be correlated with SOH. For both the cathode and the anode, the interfacial kinetics of Li-ions were analyzed to study the electrochemical properties of active particles. The RC parameters of the equivalent circuit were correlated with the diffusion kinetics of Li-ions near the interface between the electrolyte and the active nano/micro-particles during fast charging/discharging. For fresh LiFePO4 (LFP)/Li half-cells, the values and the change of Cp and Rp were explained using the hypothesis of interparticle ion transport under a non-equilibrium condition. For graphite/Li half-cells, the buffering of Li-ions by the solid-electrolyte interphase (SEI) layer was speculated to affect Cp and Rp under a non-equilibrium condition. In commercial LFP/graphite batteries, the Cp values of unhealthy batteries were found to be higher than those of healthy batteries. In further tests, the Cp values of the half cells with the graphite anode recovered from the unhealthy batteries were found to be higher than those of the half cells with graphite from the healthy batteries. The half cells with LFP from the unhealthy batteries behaved similarly to those with LFP from the healthy batteries. With additional analysis on the microstructure, we proposed that the deterioration of the LFP/graphite batteries was mostly due to the formation of a thicker SEI on the graphite anode. The method developed in this work can be integrated in EVs at a low calculation cost. More importantly, we gained a better understanding of the interfacial kinetics of Li-ions during a non-equilibrium process.
✓ 已验证
DOI
高影响因子
Chemical Engineering Journal Advances
·
2026
·
IF 6.9
Wenbin Fan,Lizhi Jiang,Bingqing Yan,Huifang Li
Driven by surging global lithium demand, highly selective lithium separation from magnesium-rich brines is urgently required. This work systematically investigated the structure–performance relationship of four aryl-substituted phosphates (TOP, DPOP, IPPP, TPP). Moderate aryl substitution widened the coordination difference between Li + and Mg 2+ through electron-withdrawing effects, and DPOP exhibited the optimal balance of extraction capacity and selectivity. A ternary synergistic extraction system was fabricated with DPOP as the primary extractant, P204 to immobilize Fe 3+ , and eco-friendly diethyl succinate (DES) as a polar modifier. DES inhibited third-phase formation at DPOP contents of 10–50 vol.% and produced synergistic solvation via carbonyl groups. Under optimized conditions, the single-stage Li + extraction efficiency achieved ∼73%, and the Li/Mg separation factor reached 1630, nearly 80 times that of the traditional TBP–FeCl 3 system. Synergistic coordination of P204 and DES stabilized Fe 3+ in the organic phase, realizing quantitative lithium stripping with deionized water and avoiding concentrated acid and saponification. The organic phase maintained over 80% extraction efficiency after ten cycles. Slope analysis and FT-IR confirmed the extracted complex LiFeCl 4 •2DPOP•0.1DES. This work transforms DPOP into a sustainable, low-cost, closed loop industrial solution for lithium recovery from high Mg/Li brines.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Ningyu Guo,Yingqiang Zhao,Peng Zhao,Qinxing Xie
A Zn-Co bimetallic ZIF-derived N-doped porous carbon with CNT network is constructed. • Acid etching tailors hierarchical porosity and exposes catalytic metal sites. • The conductive CNT framework accelerates electron/ion transport. • Strong polysulfide immobilization and rapid redox kinetics are achieved. • High capacity and stable cycling are maintained under lean electrolyte. Efficient sulfur hosts with strong polysulfide confinement and fast redox kinetics are essential for high-performance lithium-sulfur batteries. Herein, a Zn-Co bimetallic ZIF-derived multifunctional porous carbon with in-situ grown carbon nanotubes (CNTs) is constructed via controlled carbonization followed by acid etching. The resulting ZIFCA material features a hierarchical porous architecture with Zn/N-derived polar sites, a conductive CNT network, and Co-based catalytic nanodomains coupled with defect-rich carbon interfaces. These structural characteristics synergistically enhance polysulfide adsorption and accelerate sulfur redox conversion, thereby suppressing the shuttle effect and improving reaction kinetics. As a sulfur host, ZIFCA/S delivers a reversible capacity of 1035 mAh g −1 after 200 cycles at 1.0C, and retains around 700 mAh g −1 at 5C. Notably, under lean electrolyte conditions (E/S = 5.7 μL mg −1 ), ZIFCA/S maintains a capacity of 903 mAh g −1 after 110 cycles with an areal capacity of about 2.79 mAh cm −2 . This work highlights the effectiveness of integrating conductive and catalytic functionalities in ZIF-derived carbon frameworks for advanced Li-S batteries. Download: Download high-res image (162KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Chengliang Wang,Jianjiang He,Wei Zhao,Jingjiang Sun,Qingfu Wang
Solid polymer electrolytes (SPEs) synthesized via in-situ polymerization exhibit excellent interfacial compatibility; however their inherently low ionic conductivity limits their application in solid-state lithium (Li) metal batteries (LMBs). Herein, we report a type of SPE composed of succinonitrile (SN), LiTFSI, and cross-linked polymer matrix (SNCE). Within the electrolyte, Li + coordinates with ether, carbonyl, and nitrile groups; the strong SN-Li + interactions promote Li + detachment from the polymer matrix, forming continuous Li + conduction pathways. This design imparts both mechanical robustness and superior electrochemical performance to the SPEs. The cross-linked structure restricts the migration of SN, suppressing undesirable side reactions with the Li anode at the initial stage, compensating for the reduction in mechanical strength due to SN addition, and further improving electrochemical stability. The optimized SNCE-2 exhibits an ionic conductivity of 0.16 mS cm −1 at 30 °C, an electrochemical stability window (ESW) up to 5.2 V, and a Li + transference number ( t Li+ ) of 0.44. The in-situ polymerization ensures intimate electrode-electrolyte contact, and the formation of a stable solid-electrolyte interphase (SEI) on the Li anode by SNCE-2 enables Li|SNCE-2|Li symmetric cells to cycle stably for 1000 h at 0.2 mA cm −2 . The superior cycling performance of Li|SNCE-2|NCM622 and Li|SNCE-2|LFMP cells confirms the potential of SNCE-2 for high-voltage LMBs. Furthermore, the Li|SNCE-2|LFP cells demonstrates remarkable cycling durability, maintaining 86.1% of its capacity after 1000 cycles at 0.2C. Moreover, Li|SNCE-2|LFP pouch batteries also exhibit reliable safety performance. Therefore, this work provides a promising strategy for the development of SPEs for next-generation safety solid LMBs.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Zhao Yang,Zhang Wang,Jia Qingbo,Wu Can,Wang Ding,Duan Jianguo,Zhang Yingjie
P2-type cathode materials with good rate performance show significant potential for sodium-ion batteries (SIBs), but their low theoretical capacity limits further development. Here, the Na₀.₇₂Cu₀.₂₁Mn₀.₆₇Li₀.₀₆Ti₀.₀₆O₂ cathode layered material is elaborately designed, and the oxygen redox reaction of the oxygen anions gradually shifts from O²⁻ to O₂⁻ via the synergistic modulation of Li⁺ and Ti⁴⁺, especially at a higher voltage, achieving high-capacity Co/Ni-free SIBs. Notably, the NCMLT electrode delivers a capacity of 127.1 mAh·g⁻¹ after 200 cycles at the 1 C, and attains an outstanding capacity retention of 89.86%. Additionally, the metal oxide cost of the synthesized material is relatively low. Thus, this work provides a new approach to design the cathode for high-performance SIBs and offers a value for further development.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jinghai Zhang,Kangjun Ji,Zirui Wang,Wei Shi,Zhongkai Zhao,Xiao Du,Xiaogang Hao
The rapid growth in lithium demand for battery applications has driven the need for safe and efficient extraction technologies from salt lake brines. Current methods face challenges including low recovery rates, slow adsorption kinetics, and environmental concerns from organic solvent usage. To address these limitations, the environmentally friendly electrochemically switched ion exchange (ESIX) system using a three-dimensional LiMn 2 O 4 /C/SA-c-PEO@GF electrode was developed. The electrode employs sodium alginate (SA) and polyethylene oxide (PEO) as chemically cross-linked binders on a graphite felt (GF) current collector. In the constant current-constant voltage coupling drive mode, the system achieved 97% lithium extraction efficiency with an adsorption capacity of 3.89 mg·g −1 and a Li + /Mg 2+ separation coefficient of 191, the energy consumption was 14.51 Wh·mol −1 and 485 mg·L −1 Li + solution was obtained from actual Zarkhan Salt Lake brine (Mg 2+ /Li + : ∼426.6) by one-step concentration. This study shows the LiMn 2 O 4 /C/SA-c-PEO@GF electrode with high extraction efficiency and fast adsorption rate, providing a simple and efficient method for lithium recovery from salt lake brine with high Mg 2+ /Li + ratio.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zengcai Guo,Shimin Liao,Feng Li,Linlin Shi,Bihai Su,Jingbo Mu,Yanming Wang,Zhongkai Huang,Feng Xu,Chaowen Guan
The broad application of solid-state polymer electrolytes (SPEs) has been hindered by the extremely low transference number of lithium ions and ionic conductivities. This study innovatively introduces Co-doped Li 4 Ti 5 O 12 (CLTO) into poly(ethylene oxide) (PEO) matrix, CLTO not only brings a stronger interaction with TFSI − , but also weakens the Li-O bond in Li 4 Ti 5 O 12 and reduces the diffusion activation energy of Li + . Thus, CLTO introducing PEO-based polymer solid electrolytes could simultaneously promote the dissociation of Li + from LiTFSI and Li 4 Ti 5 O 12, constructing efficient dual lithium salt dissociation regions and rapid Li + conduction channels. The experimental tests and density functional theory calculations have confirmed the operational mechanisms of CLTO within the polymer matrix. As a result, the obtained SPEs exhibit a high ionic conductivity (1.09 × 10 −4 S cm −1 ) and a quite large t Li + of 0.83 at 60 °C. Moreover, the low (Highest Occupied Molecular Orbital) HOMO energy (−7.25 eV) of the CLTO-LiTFSI-PEO-10 (CLP-10) endow it can accommodate both the Li-metal anode and high-voltage cathodes. The all-solid-state LiFePO 4 ||Li and NCM811|| Li batteries offer exceptional specific capacities of 164.61 and 194.95 mAh/g at 60 °C, respectively. In addition, the pouch cell assembled with CLP-10 works stably under extreme conditions such as bending and shearing.
✓ 已验证
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Qingyi Wang,Yongping Dong,Junmei Ma,Huimin Wang,Xuping Xue,Chaojie Bai,Mingjie Lin,Lingping Luo,Congjie Gao,Lixin Xue
Polyamide/polyethylene thin film composite (PA/PE-TFC) NF membranes were prepared from reverse-phase interface polymerization (RIP) for improved Mg(II)/Li(I) separation. RIP processes between 1,3,5-benzenetricarbonyl chloride (TMC) in bottom organic phase and piperazine (PIP) in upper aqueous phase were developed to form continuous and intact surface PA separation layers on PE porous substrates thinner than traditional polysulfone (PSF) based substrates. After activation with isopropyl alcohol (IPA), PA/PE-TFC-IPA NF membranes were formed, whose NF performance could be tuned by adjusting the preparation conditions. When TMC concentration was kept at 0.15 % w/v, RIP with low PIP concentration (0.025 wt%) yield PA/PE-TFC-IPA NF membranes with negatively charged surfaces , high Na 2 SO 4 rejection rate (95 % ± 3 %) and water permeance (13–19 L·m −2 ·h −1 ·bar −1 ). RIP with high PIP concentration (0.3 wt%) formed PA/PE-TFC-IPA NF membranes with less negative surfaces, high MgCl 2 rejection rate (94.3 ± 0.7 %), low water permeance (4.8 ± 0.3 L·m −2 ·h −1 ·bar −1 ), and high Mg(II)/Li(I) separation coefficient S Li/Mg (18 ± 1) for 1000 ppm LiCl and MgCl 2 mixed solution. PA/PE-TFC-IPA NF membranes also showed good long-term stability and improved anti-fouling performance for positively charged pollutants, bearing high potential for applications in the lithium extraction processes.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
ZhiZhong Xie,Guanghui Chen,Zhien Liu,Xinxin Zhu,Dan Liu,Rong Li,Deyu Qu,Junsheng Li
Serious shuttle effect and sluggish reaction kinetics are the two major barriers that limit the cathode cycling stability in lithium-sulfur batteries. In this study, we deviate from the prevalent approach compositing sulfur with various carbonaceous materials by introducing electrocatalysis concept in lithium-sulfur chemistries. Two-dimensional graphene has been used as model system to support electrocatalyst Pt. Uniform dispersion of Pt nanoparticles on graphene layers not only demonstrate to preferential adsorption of soluble polysulfide species, but also catalyze efficiently transformation to long-chain polysulfides in the subsequent redox process. The result rGO-Pt/S composite shows a 29.5% enhancement in capacity over pristine rGO/S electrode. More impressively, rGO-Pt/S electrode exhibits good cycling stability at a high rate of 2 C corresponding to a tiny capacity fading rate of 0.01% per cycle over 300 discharge/charge cycles. Thus, this work provides a facile strategy for improving the performance of Li-S batteries toward practical application.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）