Nano Energy
·
2014
·
IF 10.211
Xu Xiao,Zehua Peng,Chi Chen,Chuanfang Zhang,Majid Beidaghi,Zhenhua Yang,Nan Wu,Yunhui Huang,Ling Miao,Yury Gogotsi,Jun Zhou
Molybdenum trioxide (MoO 3 ) is known as a promising pseudocapacitive material, but low conductivity limits its applications. Hydrogenation is demonstrated to increase the conductivity of MoO 3 and hence improve its electrochemical performance. Hydrogenated MoO 3 (MoO 3− x ) shows enhanced conductivity based on, both first principle calculations and single nanobelt measurements. Freestanding MoO 3− x /carbon nanotubes (CNT) composite films have been fabricated and showed much improved electrochemical performance compared to composites of CNT and as-synthesized MoO 3 (MoO 3 /CNT). Electrodes showed a specific capacitance of 337 F/g (based on the mass of MoO 3− x ) and a high volumetric capacitance of 291 F/cm 3 (based on the whole electrode) with excellent rate capability. Also we confirmed that the improved intercalation kinetics and the increased intercalation pseudocapacitance could be attributed to the higher electronic conductivity of MoO 3− x , which results in better and faster intercalations of Li + ions. This electrochemical behavior implies that MoO 3− x can serve as a very good negative electrode with high capacitance at high mass loading levels.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yijing Zhang,Si Sun,Ming Wang,Yaling Han,Xuan Luo,Shenzhen Cong,Tao He,Huan Pang
Membranes featuring structural stability and precise ion selectivity are indispensable for efficient lithium recovery from magnesium-rich brines. Despite the promising potential of metal-organic framework (MOF) membranes in ion separation, the flexibility of aromatic linkers in conventional MOF structures often induces pore size fluctuations, which compromises size-based discrimination efficiency. Herein, defect-free Zr-Frustrated Trigonal-symmetry Rotor (Zr-FTR) membranes were fabricated on polyethylene terephthalate (PET) substrates via a counter-diffusion interfacial growth method. The Zr-FTR framework is constructed with bicyclopentane linkers, whose rigid geometric configuration and substantial torsional energy barriers ensure the retention of a fixed pore aperture (∼4.3 Å). This rigid confinement effect significantly suppresses transient pore expansion, enabling effective ion size sieving while retaining exceptional structural stability. The optimized Zr-FTR-24 membrane exhibits a high Li + permeability of 0.09 mol m −2 h −1 and a Li + /Mg 2+ selectivity of 235, with sustained performance stability over a 7-day continuous operation in mixed-ion solutions. This work establishes a novel design paradigm for suppressing linker dynamics in MOF membranes through rigid linker engineering, ultimately achieving structurally stable and size-exclusive ion transport.
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2026
·
IF 14.9
Jin Zhao,Jie Biao,Tianqi Jia,Guohuang Kang,Geng Zhong,Xinru Wu,Rui Yin,Feiyu Kang,Yidan Cao
The practical application of high-capacity SiO anode is hindered by its low initial Coulombic efficiency (ICE). Chemical prelithiation, employing Li/arene complex (LAC) solutions, offers a promising avenue to mitigate active lithium loss and enhance ICE. However, the complex solvation environment in LAC solution easily leads to uncontrolled, aggressive prelithiation, resulting in SiO particle fracture and excessive SEI formation. To address this, we developed a standardized protocol for quantifying prelithiation degree by monitoring the open-circuit potential of Li||SiO cells. Using Li-2-methylbiphenyl-cyclic ether LAC solution system as a demonstration of this method, we identified a Li-2-methylbiphenyl-tetrahydropyran (LBP) solution with appropriate solvation power and prelithiation kinetics. Combining various characterizations and calculations, it is revealed that weak solvation in LBP solution presents loose Li + -solvent coordination, ensures reasonable desolvation of Li + ions, facilitates controlled mild prelithiation of SiO to form a radially uniform Li x Si distribution, and thus effectively preserving SiO structural integrity and achieving high ICE. Consequently, the full cell demonstrates a significant improvement in capacity retention after 130 cycles from 22.04% to 70.74%. This work provides a universal criterion for evaluating prelithiation degree and offers valuable insights into the kinetic mechanisms governing prelithiation in high-capacity SiO-based anodes.
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 9
Yihao Song,Qieyuan Gao,Junwei Li,Yuepeng Li,Yulong Cheng,Daliang Xu,Mian Wu,Zhao Wei,Xiaoqi Sun,Yaowen Xing,Bart Van der Bruggen,Zirui Lin,Xiahui Gui
Polyamide (PA) membranes are promising nanofiltration (NF) materials for Li + -Mg 2+ separation in lithium extraction from salt-lake brines. However, their limited water permeance and reliance on acidic environments to maintain protonated electropositive surfaces hinder overall performances. Herein, we introduced a carboxyl doped PA NF membrane, hereafter referred to as GLY/PA-PDA (GLY = glycine; PDA = polydopamine). The hydrophilic ultrathin rough GLY/PA rejection layer and PDA interlayer enabled an exceptional water permeance of 17.2 L m −2 h −1 bar −1 . More importantly, carboxyl groups acted as unique Mg 2+ catchers to functionalize surfaces, resulting in enhanced surface positive charge intensity and sustained ion selectivity. The GLY/PA-PDA membranes achieved an impressive Li + -Mg 2+ separation coefficient of 30.5 in mixed-cation feeds. During a 3-stage separation process, the membrane demonstrated continuously increasing separation coefficients of each stage, obtaining an ultra-low-Mg 2+ extraction solution of 0.06 ppm. Our work proposes a direction for improving selectivity by utilizing guest metal cations within NF systems.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE SCIENCE BULLETIN
·
2012
·Vol. 57
·期 32
·4210-4214
·
IF 1.321
Zhang LeiLei,Wang ZhongLi,Xu Dan,Xu JiJing,Zhang XinBo,Wang LiMin
Lithium-air (Li-air) batteries have attracted worldwide attention due to their high energy density (11140 Wh kg −1 ) comparable to gasoline. In this work, we have synthesized the α-MnO 2 hollow clews via a simple method and characterized them by X-ray diffraction and scanning electron microscope. Interestingly, cycle performance of Li-air batteries is improved greatly when using the α-MnO 2 hollow clews as the catalyst. The first discharge capacity is 596 mAh g −1 , and the charge capacity is 590 mAh g-1 at the current density of 0.1 mA cm −2 between 2.0 and 4.2 V using the Vulcan XC-72 as the carbon material. Additionally, by re-assembling new batteries with the used lithium foil, separators and cathode separately, we find that the cathode is the key role to end the Li-air battery life.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 36
·2401497
·
IF 13
Shiqi Liu,Jie Wan,Boya Wang,Chenghan Li,Yulong Wang,Lin Wang,Haipeng Wu,Nian Zhang,Xu Zhang,Haijun Yu
Manganese-based lithium-rich layered oxides (Mn-LLOs) are promising candidate cathode materials for lithium-ion batteries, however, the severe voltage decay during cycling is the most concern for their practical applications. Herein, an Mn-based composite nanostructure constructed Li 2 MnO 3 (LMO@Li 2 MnO 3 ) is developed via an ultrathin amorphous functional oxide Li x MnO y coating at the grain surface. Due to the thin and universal LMO amorphous surface layer etched from the lithiation process by the high-concentration alkaline solution, the structural and interfacial stability of Li 2 MnO 3 are enhanced apparently, showing the significantly improved voltage maintenance, cycle stability, and energy density. In particular, the LMO@Li 2 MnO 3 cathode exhibits zero voltage decay over 200 cycles. Combining with ex situ spectroscopic and microscopic techniques, the Mn 2+/4+ coexisted behavior of the amorphous LMO is revealed, which enables the stable electrochemistry of Li 2 MnO 3 . This work provides new possible routes for suppressing the voltage decay of Mn-LLOs by modifying with the composite functional unit construction.
研究领域:
材料科学
·
电化学
·
储能
·
锂离子电池
·
纳米材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Nan Wang,Hancheng Yuan,Yanna NuLi,Jun Yang,Jiulin Wang
The development of rechargeable Mg-based batteries with a high energy density is restricted by the high-voltage cathodes and the parasitic side reactions between the battery components and electrolytes operating at relatively high potentials. Here, we develop a hybrid Mg2+/Li+ cell using a monoclinic or orthorhombic Fe2(MoO4)3 cathode, a Mg anode, and a simple (PhMgCl)2–AlCl3 + LiCl electrolyte. Hastelloy-C alloy is proposed as a current collector of high-voltage cathode for the hybrid Mg2+/Li+ battery within a Swagelok-type cell. The application of the Hastelloy-C alloy current collector breaks the crucial bottleneck of incompatibility between the currently available current collectors and electrolytes. The hybrid cell features a low voltage polarization between the discharge and charge profiles, which is in favor of practical applications. On the other hand, because all Li+ ions are supplied by the electrolyte in a hybrid Mg2+/Li+ battery, a high Li+ concentration is required to operate at high capacities for the hybrid battery. We further show the first-hand evidence about the compensation of Li+ ions by simply soaking the cathode in the hybrid electrolyte. The prelithiation of Li+ ions into monoclinic Fe2(MoO4)3 significantly enhances the cycling stability and reversibility.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Yanke Lin,Ke Liu,Maochun Wu,Chen Zhao,Tianshou Zhao
The pressing need for advanced energy storage devices with high energy density and safety is leading research to solid-state Li metal batteries (SSLMBs). However, the advancement of this type of battery is impeded by the incompatibility and the inferior interfacial contact between solid-state electrolytes and electrodes. In this work, the issues are addressed by introducing the PEGDA/Pyr13TFSI ionogel into the interfaces between a NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) solid electrolyte and the electrodes via a simple drop-coating and in situ polymerization method. It is demonstrated that the formed robust and elastic ionogel interlayers not only preclude the adverse reactions between the LATP pellet and the Li metal anode but also significantly reduce the interfacial resistances. As a result, the cycling life of the Li/Li symmetric cell with the ionogel interlayers reaches up to 300 h, whereas the cell using the bare LATP dies after only 10 h. More notably, the Li/ionogel/LATP/ionogel/LiFePO4 full battery delivers a high capacity of 152.5 mAh g–1 at 0.5 C at 60 °C with a retention of 91.5% after 200 cycles, in a sharp contrast to the value of as low as 46 mAh g–1 even at 0.1 C given by the Li/ionogel/LATP/LiFePO4 cell. These encouraging results demonstrate that the interfacial modification strategy proposed in this work is effective in constructing stable, compact, and durable interfaces between solid electrolytes and electrodes, thereby paving the way for high-performance SSLMBs.
研究领域:
电化学
·
材料科学
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能源存储
·
固态电池
·
界面工程
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yi-Xuan Li,Xiang Ding,Fei Chen,Kuo Cao,Chun-Hua Chen
NaClO 4 is utilized as a salt-type electrolyte additive to improve the electrochemical performance in both Li-rich/graphite full cells and Li-rich/Li half cells. The corresponding characterizations such as scanning electron microscopy and X-ray photoelectron spectroscopy reveal that the NaClO 4 -added electrolyte can suppress the transition metal dissolution from Li-rich cathode and form a stable conductive cathode electrolyte interface layer to protect Li-rich cathode and promote Li + ions transfer. A small amount (0.1 wt%) of NaClO 4 additive enables Li-rich/graphite full cells to maintain 86% capacity after 50 cycles and Li-rich/Li half cells to maintain 95% capacity after 100 cycles, showing a great application potential.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
功能材料
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2019
·Vol. 29
·期 3
·310-315
·
IF 3.31
Chao Hou,Ke Yang,Fawei Tang,Haibin Wang,Xuemei Liu,Xiaoyan Song
A micro-nano combined composite with Li-Si alloy nano-domains in three-dimensional carbon network was prepared as a novel electrode material. The carbon network constrained the volume contraction and promoted effectively charge transfer of the whole active material. Meanwhile, the abundant interfaces between Li-Si alloy and carbon bound by Li-C ionic bonds, not only enhanced the delithiation at interface but also ensured the structural integrity. The present composite exhibited excellent electrochemical performance. The specific capacity at the first lithiation was as high as 1133 mAh g −1 at a current density of 0.1 A g −1 , which is superior to those reported for the core-shell structured nanoparticles. The Coulombic Efficiency at the first cycle was 90.4% and kept stable at more than 99.0% after only 10 cycles. The capacity retention was nearly twice as that of the incompact mixture of Li-Si nanoparticles and carbon. The energy density of the full cell constructed by the present composite and sulfur was evaluated to be 3 times as high as that of the commercial lithium-ion batteries. This work provides a new universal strategy for developing Li-rich anode materials with high combination properties and low cost.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态物理
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhi Gu,Xing Xin,Jing Yang,Dingcheng Guo,Shujiao Yang,Jinghua Wu,Yong Sun,Xiayin Yao
The practical application of lithium–oxygen (Li–O2) batteries is limited by the formation of lithium dendrites and the use of flammable and unstable organic liquid electrolytes, which would cause safety issues and poor cycling stability. Herein, we present a bilayer organic/inorganic hybrid solid-state electrolyte to improve the safety and enhance the electrochemical performance of Li–O2 batteries. Si-doped NASICON-type electrolyte Li1.511Al0.5Ge1.5Si0.01P2.99O12 (LAGP-Si) serves as an inorganic rigid backbone to guarantee high ionic conductivity and provide a barrier between active oxygen and lithium anode. Poly(ethylene glycol) methyl ether methacrylate (PEGMEM) is chosen as a polymer buffer layer due to its compatibility with lithium. Benefiting from the synergistic effect between LAGP-Si and PEGMEM, the obtained hybrid electrolyte exhibits high ionic conductivity and good stability against lithium anode. Consequently, the polarization of the Li symmetric cell is dramatically reduced by replacing pure LAGP-Si with a bilayer hybrid electrolyte. The solid-state Li–O2 batteries employing a PEGMEM@LAGP-Si electrolyte deliver a greater initial discharge–charge capacity of 7.3 mAh cm–2 and enhanced cyclic performance for 39 cycles with a restricted capacity of 0.4 mAh cm–2. The present work delivers a promising category of hybrid solid electrolytes for high-performance solid-state Li–O2 batteries.
研究领域:
材料科学
·
电化学
·
储能
·
固态电池
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yun Zhao,Yimei Lai,Yuanyuan Zhang,Bin Ding,Jianyong Yu,Jianhua Yan
Li-metal anodes promise to build high-energy-storage systems, but they suffer from safety problems from severe dendrite growth. Here, we develop a thin and conformal hybrid ionic and electronic conducting metal-oxide nanofiber interface to stabilize Li-anodes without forming dendrites. The thin ionic-conductive Li0.33La0.56TiO3 (LLTO) nanofiber film is first fabricated by electrospinning followed by pyrolysis. After connecting with the electrolytes-wetted Li-metal anodes, due to the self-driven chemical reactions, LLTO is reduced, and a hybrid conducting interface is developed. The interface can act as a reservoir to redistribute the nonuniform Li-ion flux above the anode surface and reduce the driving force of dendrite formation by leveling electric potential distribution, enabling a stable Li plating-stripping with a low overpotential of 80 mV over 800 h at a high current of 5 mA/cm2. More practically, the Li-LiNi0.8Co0.15Al0.05O2 cells deliver a high capacity of 147 mA h/g at 1 C with a Coulombic efficiency of 99% over 150 cycles, offering prospects to achieve reliable Li-metal batteries.
研究领域:
储能
·
材料科学
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）