Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
He Na,Zhong Lei,Xiao Min,Wang Shuanjin,Han Dongmei,Meng Yuezhong
Sulfur is a promising cathode material with a high theoretical capacity of 1672 mAh g −1 , however, the practical energy density of Li-S battery is far away from such promising due to its low active material utilization and low sulfur loading. Moreover, the challenges of the low electrical conductivity of sulfur and the high solubility of polysulfide intermediates still hinder its practical application. Here, we report a kind of free-standing and foldable cathodes consisting of 3D activated carbon fiber matrix and sulfur cathode. The 3D activated carbon fiber matrix (ACFC) has continuous conductive framework and sufficient internal space to provide a long-distance and continuous high-speed electron pathway. It also gives a very larger internal space and tortuous cathode region to ACFC accommodate a highly sulfur loading and keeps polysulfide within the cathode. The unique structured 3D foldable sulfur cathode using a foldable ACFC as matrix delivers a reversible capacity of about 979 mAh g −1 at 0.2C, a capacity retention of 98% after 100 cycles, and 0.02% capacity attenuation per cycle. Even at an areal capacity of 6 mAh cm −2 , which is 2 times higher than the values of Li-ion battery, it still maintains an excellent rate capability and cycling performance.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hanwei Zhang,Xuri Wang,Ahmad Naveed,Tianyi Zeng,Xiaoyun Zhang,Hancheng Shi,Mingru Su,Aichun Dou,Yu Zhou,Yunjian Liu
Nickel-rich cathode materials are widely used for electronic devices because of their high capacity and rate performance. However, structural deterioration after long-term cycling leads to a significant decline in capacity and cycle life. In this work, the effects of three different cations doping on the structural stability and electrochemical performance of Ni-rich cathode materials were investigated. XRD characterization reveals that doped cation leads to broadening of the distance between Li layers and inhibiting Li + /Ni 2+ mixing arrangement. Compared with Na + and K + , the high valence Mg 2+ provides a stronger Mg-O bond, which can effectively restrain the undesired phase transition and sustain the ordered structure. Electrochemical tests demonstrate that NCA with Mg doping has better cycle stability and rate performance than Na and K. The capacity retention rate of NCA with 1% Mg doping is 87.7% after 200 cycles at 1C, and it can still provide a specific capacity of 146.8 mAh g −1 at a high rate of 5C.
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ChemElectroChem
·
2023
·Vol. 10
·期 16
·e202300184
·
IF 4
Yang Su,Hai-Lin Ren,Shuai Zhao,Ping-Ping Sun,Jia-Qi Li,Xiao-Min Wang
In this paper, [Ni 0.9 Co 0.1 ](OH) 2 precursor is used to dope H 3 BO 3 to synthesize positive electrode material when mixing lithium in wet method, and to explore the best doping by testing the microscopic morphology and electrochemical performance of the positive electrode material amount and calcination temperature. After doping with B, the microstructure of the material is improved, and the primary crystal grains are oriented and agglomerated into a needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical fracture, and improve the cycle stability of the positive electrode material. After doping B, the discharge specific capacity was slightly improved. When the calcination temperature is 750 °C and the doping amount of B is 1.0 mol%, the first discharge specific capacity reaches 223 mAh g −1 . More importantly, the capacity retention rate of the battery after 100 cycles has been greatly improved, from 74 % without doping B to 87 %. Graphical Li-ion Batteries : The B-doping improves the microstructure of the material, and the primary grains are oriented and agglomerated into a long needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical breakage, and improve the cycling stability of the cathode material.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zhuo Tan,Baoling Chu,Chenguang Wang,Jing Tian,Yi Nie,Hongshuai Gao
Efficient recovery and high-value utilization of keratin from waste human hair are of significant interest for sustainable materials development. However, the densely cross-linked disulfide bonds and extensive hydrogen-bond network of keratin make its mild and efficient extraction challenging. In this work, a redox-active deep eutectic solvent (DES) composed of L-cysteine (L-Cys) and monoethanolamine (MEA) was developed for keratin recovery from waste human hair. Under optimized conditions of 80 °C, 3.5 h, and 10 wt% solid loading, the keratin recovery yield reached 96.5%, and the solvent maintained stable performance over five recycling cycles. Experimental results, together with DFT and MD simulations, indicate that the dissolution process is driven by synergistic disulfide bond cleavage and disruption of the hydrogen-bond network, while the protein backbone remains largely intact. The recovered keratin was further phosphorylated and co-regenerated with cellulose to fabricate a phosphorylated keratin/cellulose composite membrane (P-KCM). The membrane exhibited efficient and selective Fe 3+ adsorption, with a maximum adsorption capacity of 297.8 mg·g −1 . FT-IR and XPS analyses reveal that phosphate groups serve as the primary coordination sites for Fe 3+ . In tests with real LiFePO₄ leachate, P-KCM removed 97.3% of Fe 3+ while leaving 80.1% of Li + in solution, and it retained 84.7% of its initial adsorption capacity after four adsorption-desorption cycles. This work provides a mild, efficient, and recyclable strategy for keratin valorization and offers a feasible approach for selective metal ion separation and pre-treatment in battery recycling.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Cuijing Liu,Bo He,Lei Li,Mengtian Bai,Zhangji Fan,Jiangfeng Song,Linbo Li,Xihong He,Hideto Matsuyama
Covalent organic frameworks (COFs) are promising candidates for fabricating ion-selective membranes towards Li + extraction from brines. However, most COF membranes feature nanoscale pores, limiting their capability to sieve angstrom-sized ions. Herein, a DG-TBB membrane with angstrom-sized, lithiophilic and positive channels was fabricated via the condensation of a small, positively charged amine (1,3-diaminoguanidine monohydrochloride, DG) with an aldehyde containing lithiophilic groups (2,4,6-trimethoxy-1,3,5-benzenetricarbaldehyde, TBB). For comparison, the DG-TFB membrane based on 1,3,5-triformylbenzene (TFB) without lithiophilic groups was adopted to clarify the role of Li + -affinitive sites, while the ODH-TBB membrane containing neutral oxalyl dihydrazide (ODH) was employed to evaluate charge effect. Benefiting from the synergistic effects of Li + affinity and Donnan exclusion, DG-TBB membrane delivered the highest Li + permeation rate of 73.6 mmol m −2 h −1 and Li + /Mg 2+ selectivity of 1200, which were superior to DG-TFB (4.3 mmol m −2 h −1 , selectivity of 238) and ODH-TBB (64.9 mmol m −2 h −1 , selectivity of 39). Moreover, DG-TBB exhibited robust separation performance in diverse practical scenarios and for various mono-/divalent cations. This study demonstrates that the rational integration of angstrom-sized pores, lithiophilicity and positive charge into COF channels enables highly efficient ion separation.
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Journal of Energy Storage
·
2026
·
IF 10.7
Wenxuan Fan,Yan Zhou,Xinglin Zhou,Lei Huang,Xiaohui Ning
The intrinsic three-layer liquid architecture of liquid metal batteries (LMBs) enables a simple cell configuration, high safety, low projected cost, and exceptional theoretical cycle life, making them a promising technology for grid-scale energy storage. However, under high-temperature and multi-physics operating conditions, the corrosion of the stainless steel positive current collector (PCC) by molten cathode metal and halide electrolyte limits long-term durability. A systematic evaluation of commercially available stainless steels under realistic electrochemical, thermal, and chemical conditions is therefore essential. Herein, we investigate the corrosion behaviors of four representative stainless steels (SS201, SS304, SS316, SS430) used as PCCs in Li|LiCl-LiF-LiBr|Bi liquid metal batteries through a two-stage approach combining high-temperature hanging-coupon screening and service-condition cell testing. The results reveal pronounced synergistic corrosion during battery operation, where the combined effects of molten Bi , molten salt electrolyte, and electrochemical polarization substantially accelerate PCC degradation compared to static exposure. Among the investigated materials, SS316 exhibits the highest corrosion resistance, enabling stable cycling without observable capacity decay over 100 cycles. By integrating corrosion resistance, electrochemical performance, and techno-economic considerations, this work establishes an engineering-oriented PCC selection framework and identifies SS316 as the optimal candidate for 200 Ah-scale LMBs, allowing thinner, lighter, and more cost-effective collector architectures. The elucidated corrosion mechanisms under coupled electrochemical, thermal, and flow conditions provide critical insights for the rational design of durable and commercially viable liquid metal batteries.
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Science Advances
·
2026
·Vol. 12
·期 26
·
IF 13.9
Xin Jia,Xinyu Da,Yanyang Qin,Yuxin Ouyang,Yuanjun Zhao,Na Li,Jing Chen,Shujiang Ding
Composite solid electrolytes (CSEs) hold great promise for advancing safer and higher-energy-density solid-state batteries. However, the poor interface compatibility caused by the lithium carbonate (Li 2 CO 3 ) passivation layer on the garnet-type Li 6.4 La 3 Zr 1.7 Ta 0.3 O 12 (LLZTO) surface leads to an inhomogeneous distribution of ceramic particles and discontinuous lithium ion (Li + ) transport, especially for high-content ceramics. Herein, we chemically convert the Li 2 CO 3 layer into brushlike poly(ethylene glycol) methyl ether acrylate- co -2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate (PEGMA- co -UPyMA) polymers. These modified ceramics (LLZTO- g -PEGMA- co -UPyMA) are integrated with a dynamic supramolecular ionic conducting polymer (DSICP) through hydrogen bond coupling, yielding a homogeneous LLZTO- g -PEGMA- co -UPyMA@DSICP CSE with continuous Li + transport pathways, even at 90 weight % ceramic loading. This CSE enables exceptional cycling stability, with Li|LiFePO 4 cells retaining 88.8% capacity after 2000 cycles and 4.4-volt Li|NMC811 cells maintaining 83.7% after 300 cycles. Impressively, the 1.26–ampere hour pouch cell retains 85.6% capacity after 100 cycles, demonstrating unprecedented feasibility for practical solid-state lithium batteries.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Wenhui Cui,Shuaitong Liang,Junping Miao,Wenli Li,Hanwen An,Rongrong Yu,Juan Zhou,Ruiqi Shao,Zhiwei Xu
Molecular engineering of cellulose is essential for improving ionic conductivity and mechanical stability in solid polymer electrolytes. This work presents the first utilization of apocynum venetum, a drought-resistant biomass, as a sustainable source of cellulose nanofibers (CNFs) to investigate lithium-ion (Li + ) transport mechanisms in composite polymer electrolytes for lithium metal batteries (LMBs). The reconstructed type II cellulose disrupts the polymer chain order by reorganizing hydrogen bonds and expanding amorphous regions, leading to a high Li + transference number of 0.67 and an extended electrochemical window of 5.5 V. Operando synchrotron SAXS/WAXS reveals that CNFs modulate the structural evolution of the electrolyte and facilitate the formation of continuous Li + conduction pathways within the amorphous phase. Through ion–dipole interactions among CNFs hydroxyl groups, PEO ether oxygens, and Li + , dynamic Li + ─O coordination structures are formed, enhancing Li + mobility. This work demonstrates the critical role of apocynum venetum-derived nanocellulose in enhancing the performance of bio-based polymer electrolytes.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Wenting Fan,Yijiao Wang,Xiuying Jin,Yugen Zhang,Xiang Zhang,Tengfei Zhang
Sulfide-based solid-state electrolytes (SSEs) are attractive candidates for high-energy all-solid-state lithium-ion batteries due to their high ionic conductivity. However, the intrinsic chemical instability against Li metal leads to continuous interfacial degradation. Herein, we design a gradient hybrid electrolyte by introducing a borohydride-based interfacial buffer to achieve complete anode-electrolyte isolation without sacrificing energy density. The borohydride component, with its intrinsic reducibility and deformability, facilitates the formation of a stable solid electrolyte interphase (SEI) while maintaining ionic transport comparable to pristine sulfide SSEs. Benefiting from this interfacial stabilization, the hybrid SSE enables long-term cycling over 2000 h and delivers a high specific capacity of 516.3 mAh g–1 at 10 C with selenium cathode featuring dual-electron reactions. This study demonstrates that borohydride-mediated interfaces effectively suppress parasitic reactions and provide a universal and scalable strategy to unlock the potential of sulfide-based solid-state batteries.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Ying Cheng,Yanxia Sun,Shengde Dong,Luxiang Ma,Xin He,Qi Xu,Ziyu Wang,Yu Tang,Ping Li,Chunxi Hai,Yuan Zhou
The nanofiltration (NF) membrane, as an emerging lithium resource extraction technology, precisely screens Mg2+ and Li+ through the Donnan effect and steric hindrance. However, most NF membranes still struggle to break through the “trade-off effect”, and how to effectively overcome this effect to achieve a balance between high ion rejection and high permeability remains a great challenge. In this study, sodium alginate (SA) was added to the aqueous phase during the preparation of polyethylenimine-trimesoyl chloride (PEI-TMC) NF membranes. The bifunctional groups of SA can achieve synergistic effects: −COOH can produce electrostatic interaction with PEI to reduce amine sites, while −OH can form a competitive relationship with PEI to reduce the reactivity of amine groups, thereby forming a loose and thin separation layer. The permeability was significantly improved, and its water flux increased from 34.68 L·m–2·h–1 to 92.04 L·m–2·h–1, representing a nearly 3-fold increase compared to the PEI-TMC NF membrane. At the same time, the reduction of amine groups participating in the reaction under the optimal conditions increases the positive charge on the membrane surface, maintaining the original high separation performance SLi+/Mg2+=21.18). Through a three-stage nanofiltration process, the Li+/Mg2+ ratio in real salt-lake brine can be reduced to 0.86, and the improved adsorption-membrane coupled process can further reduce the Li+/Mg2+ ratio to 0.04, significantly reducing the interference of high-concentration Mg2+ in the lithium extraction process. Finally, this study systematically compared the cost and environmental impact of the modifier used in this work with those of other common modifiers. The results show that the proposed modifier is cost-effective and environmentally friendly, with higher feasibility for practical industrial applications. Therefore, this work exhibits promising application prospects in the field of lithium extraction from salt lakes.
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CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Jingdan Lei,Yajing Wang,Xiaoyun Yang,Xiwei Zhang,Di Yuan,Huijuan Geng,Dan Hu,Gui Yang,Chao Wang
Polycrystalline SnSe is more favorable for practical applications compared with its single-crystalline counterpart due to its easier scalability and mechanical robustness. However, its TE performance is limited by poor electrical transport properties, resulting in a low carrier concentration and modest power factor. Here, we demonstrate both theoretically and experimentally that alkali metal Li doping serves as an effective carrier engineering strategy to overcome performance limitations. First-principles calculations reveal that Li acts as an efficient acceptor, inducing a significant charge transfer and modifying the electronic structure. Experimentally, doping Li increases the carrier concentration 2 orders of magnitude up to 1.8 × 1019 cm–3, resulting in significantly enhanced electrical conductivity and a peak power factor of 7.1 μW cm–1 K–2. Eventually, a high zT value of ∼2.0 at 823 K is achieved in Li-doped SnSe. This work offers important insight for the rational design of high-performance polycrystalline SnSe.
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MOLECULES
·
2026
·Vol. 31
·期 7
·1172
·
IF 5.1
Bing Chen,Yiwen Li,Chaojiang Fan,Qingpei Zhou,Wenhu Li,Hang Su,Cong Li,Shixiong Zhang,Chenhui Yang,Teng Wang
Lithium–sulfur (Li-S) battery technology has attracted significant research interest owing to sulfur’s remarkable theoretical capacity and exceptional energy density potential. Nevertheless, the low conductivity of sulfur and the “shuttle effect” pose challenges to its practical applications. To enhance electrochemical performance, this work developed nitrogen-doped graphene (NG) nanosheets as a separator coating for Li-S battery. As a modification layer for separators, NG acts as a physical barrier that prevents polysulfides from migrating across the separator to reach the anode, thereby mitigating the shuttle effect. Additionally, NG improves the conductivity of the separator and enhances wettability between the separator and electrolyte, facilitating uniform transmission of lithium ions. Notably, NG functionalized separators demonstrate excellent mechanical flexibility, contributing to improved cycle stability for batteries. Furthermore, theoretical calculations indicate a strong interaction between NG and lithium polysulfides (LiPSs), effectively inhibiting polysulfide migration. The Li-S battery utilizing the NG modified separator maintains a capacity retention rate of 51.5% after 100 cycles at 0.1 C with a sulfur loading of 1.47 mg/cm2and exhibits a capacity decay rate of only 0.092% after 500 cycles at a discharge rate of 1 C. This work highlights the potential advantages of employing NG as a separator coating layer in enhancing the electrochemical performance of the Li-S battery.
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高影响因子
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