SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jiaru Wei,Beichen Sun,Wenbiao Ma,Fengfeng Gao,Xiaowei An,Xiao Du,Xiaogang Hao
Spinel LiMn 2 O 4 is a promising electrode for electrochemically switched ion exchange (ESIX) lithium extraction, but its sluggish solid-phase diffusion and severe Mn dissolution limit its application in high-Mg 2+ /Li + salt lake brines. Herein, we report a clear size effect that regulates Li + intercalation kinetics and Mg 2+ /Li + separation by comparing hydrothermally synthesized nano-sized N-LiMn 2 O 4 (20–100 nm) and commercial micron-sized LiMn 2 O 4 (∼10 μm). Nanosizing induces preferential exposure of thermodynamically stable (111) facets, effectively suppressing surface reconstruction and Mn dissolution. In-situ distribution of relaxation time (DRT) reveals that the rate-limiting step changes from pure solid-phase diffusion in micron LiMn 2 O 4 to surface-diffusion co-control in N-LiMn 2 O 4 , reducing solid-phase diffusion resistance by 75% and charge-transfer resistance by 78.6%. Benefiting from kinetic optimization, the N-LiMn 2 O 4 /C/PVDF electrode maintains a Li + /Mg 2+ separation factor > 100 even at an ultrahigh Mg 2+ /Li + ratio of 500, far exceeding the micron counterpart. After optimization (wet film thickness = 200 μm, adsorption potential = 1.0 V), the electrode retains >90% capacity after 10 cycles in 200 mg·L −1 LiCl solution. This work clarifies the size-dependent kinetic transition mechanism and provides a rational design strategy for high-selectivity electrodes toward efficient lithium extraction from high-Mg/Li brines.
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DOI
高影响因子
SOLID STATE IONICS
·
2022
·
IF 3.699
Tianxiang Ning,Yanzhi Zhang,Qian Zhang,Xuefeng Shen,Yinyi Luo,Taoyong Liu,Piao Liu,Zhiwei Luo,Anxian Lu
In this study, Ta single-doped Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (Ta 0.6 ) and a series of Ta, Sr co-doped Li 6.4+x La 3-x Sr x Zr 1.4 Ta 0.6 O 12 (Ta 0.6 Sr x , x = 0.1, 0.2, 0.3, and 0.4) electrolytes are synthesized via a two-step process. The XRD result reveals that all samples have a pure cubic phase, which indicates that Ta 5+ and Sr 2+ can enter the lattice of LLZO and stabilize the cubic phase. The SEM images exhibit that all samples have a dense microstructure and tight grain boundary without obvious holes. The excellent properties are achieved when the doping amount of Sr reaches 0.2 mol. Among all designed samples, the Ta 0.6 Sr 0.2 has the highest Li + conductivity and relative density of 8.54 × 10 −4 S cm −1 and 98.79%, respectively, as well as the lowest activation energy roughly 0.302 eV. Additionally, the symmetrical cell's galvanostatic cycling data show that it has excellent cycling performance and extremely low overpotentials even after 350 cycles, indicating that it can be successfully applied to next-generation all-solid-state lithium-ion batteries (ASSLIBs).
研究领域:
材料科学
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电化学
·
能量存储
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Xuelian Fu,Yuchao Li,Chengzhu Liao,Weiping Gong,Mingyang Yang,Robert Kwok Yiu Li,Sie Chin Tjong,Zhouguang Lu
Low ionic conductivity and large interfacial impedance between the electrode and electrolyte are the main bottleneck issues of the current solid electrolytes . In this study, a novel 3D hierarchical solid electrolyte was developed to tackle the large interfacial impedance problem. A flexible polyethylene oxide/lithium chlorate (PEO/LiClO 4 ) was in-situ formed inside the 3D porous Li 6.28 La 3 Zr 2 Al 0.24 O 12 (LLZAO) network by simply using a cleanroom wiper as the template. The obtained 3D LLZAO-PEO/LiClO 4 composite solid electrolyte exhibited a high ionic conductivity of 2.25 × 10 −5 S cm −1 at 30 °C, being 30.7 times higher than that of pristine PEO/LiClO 4 electrolyte. The improved ionic conductivity was attributed to the 3D porous LLZAO structure with continuous fast ion transport pathways. In addition, the 3D LLZAO network can effectively inhibited the growth of lithium dendrite , leading to excellent stability and desirable safety during lithium stripping/plating cycling. Furthermore, the all-solid-state LiFePO 4 /Li battery system based on the obtained 3D LLZAO-PEO/LiClO 4 electrolyte showed a high initial discharge specific capacity of 143.8 mAh·g −1 and a high capacity retention of 86% after 200 cycles at 60 °C. This 3D composite solid electrolyte design is very effective in reducing the interfacial impedance and provides a solution for the further development of high-performance solid electrolyte for all-solid-state rechargeable batteries.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Minsong Huang,Zhenguo Yao,Qingping Wu,Yongjian Zheng,Jianjun Liu,Chilin Li
Anode interface modification is crucial for the stabilization of Li–metal batteries (LMBs), which have been considered as the most promising system for the electric vehicle market owing to their high energy density (500 W h kg–1). However, the biggest challenge for LMBs lies in the preservation of anode reversibility, including plated Li morphology control and dendritic Li inhibition during cycling. Here, we propose a nanostructure modulation strategy of Li grains and plating to activate the anode kinetics of LMBs without the compromise of anode stability. This modulation is triggered by the rapid deposition of ultrathin polydopamine coating on the Cu foil (PDA@Cu), which results in an unusual interlaced growth of vertical or lie-down two-dimensional Li nanoflakes on PDA. The high binding energy (>3 eV) between Li atoms and rich imino/carbonyl groups enables a superior lithiophilicity of PDA to homogenize the Li-ion flowing and Li-mass electroplating with negligible nucleation overpotential. The high Coulombic efficiency (98%) and low voltage hysteresis (∼20 mV) are stabilized for at least 300 cycles in the Li–PDA@Cu cell architecture. This PDA@Cu electrode can even tolerate much higher current densities of 5 and 10 mA cm–2 for 170 and 100 cycles, respectively. The interlaced network of Li nanosheets reinforces the electric contact and therefore charge transfer at the anode–electrolyte interface characterized by small interfacial resistance (<3 Ω cm2) and activation energy (0.28 eV). A viewpoint of robustness loss or mechanical heterogeneity in Li plating is discussed to disclose the evolution from column-like Li grains to porous Li sponges and then to compactly stacked Li nanoflakes with porosity shrinkage.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Ying Zhou,Xiangru Sun,Peiran Tan,Qi Chen,Huateng Song,You Zhang,Yan Han,Dejun Li
Lithium (Li) metal is considered to be one of the most promising anodes for next-generation high-energy-density batteries owing to its high theoretical capacity and low redox potential. However, the practical application of Li metal anodes has been hindered by the unstable interface and the growth of Li dendrites. Herein, a highly stable surface-patterned Li metal anode has been developed, in which composite nanowires composed of lithium phosphide and copper nanoparticles are riveted within the regular grooves of the Li metal surface. The lithiophilic and mixed ion/electron-conducting composite nanowires in the grooves effectively accelerate the charge transfer kinetics and regulate the lithium-ion distribution, enabling a highly reversible Li plating/stripping process within the grooves. Benefiting from this design, the obtained Li metal anodes achieve excellent cyclability for over 3000 h at 1 mA cm −2 /1 mAh cm −2 with a low overpotential of 20.3 mV. Furthermore, when coupled with commercial LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathodes, the cells achieve excellent cycling stability for over 600 and 400 cycles at 0.5 and 2 C, respectively. This study may provide a viable strategy to develop high-performance Li metal batteries through the facile design of Li metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FERROELECTRICS
·
2024
·
IF 0.6
Zhao Hong,Xu Dan,Yu Taolin,Duan Xiaoyang,Zhou Xinyuan,Zhao Wenjie,He Jun
The effects of Li/Er and Li/Bi co-substitution on the structure, dielectric, and ferroelectric properties of BaTiO3 (BT) ceramics were investigated and analyzed. X-ray diffraction measurements show that the doped samples have a single tetragonal structure without secondary phases. Rietveld refinement results show that the Li/Er and Li/Bi ions tend to replace A-sites of BT lattices at low doping content. As the doping content increases, the Curie temperature moves to the high-temperature region due to the increased tetragonality and internal stress. Compared with the undoped ceramics, the ferroelectric properties of the doped ceramics are improved. The enhanced remnant polarization is attributed to the combined effects of large grain modulation and defect dipole arrangement.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Nature Energy
·
2023
·Vol. 8
·期 8
·800-813
·
IF 56.7
Yan Wenlin,Mu Zhenliang,Wang Zhixuan,Huang Yuli,Wu Dengxu,Lu Pushun,Lu Jiaze,Xu Jieru,Wu Yujing,Ma Tenghuan,Yang Ming,Zhu Xiang,Xia Yu,Shi Shaochen,Chen Liquan,Li Hong,Wu Fan
All-solid-state batteries (ASSBs) with Li metal anodes or Si anodes are promising candidates to achieve high energy density and improved safety, but they suffer from undesirable lithium dendrite growth or huge volume expansion, respectively. Here we synthesize a hard-carbon-stabilized Li–Si alloy anode in which sintering of Si leads to the transformation of micro-metre particles into dense continuum. A 3D ionic-electronic-conductive network composed of plastically deformable Li-rich phases (Li 15 Si 4 and LiC 6 ) that enlarges active area and relieves stress concentration is created in the anode, leading to improved electrode kinetics and mechanical stability. With the hard-carbon-stabilized Li-Si anode, full cells using LiCoO 2 or LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes and Li 6 PS 5 Cl electrolyte achieve favourable rate capability and cycle stability. In particular, the ASSB with LiNi 0.8 Co 0.1 Mn 0.1 O 2 at high loading of 5.86 mAh cm −2 delivers 5,000 cycles at 1 C (5.86 mA cm −2 ), demonstrating the potential of using hard-carbon-stabilized Li–Si alloy anodes for practical applications of ASSBs.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yue Chen,Minghui He,Ning Zhao,Jingming Fu,Hanyu Huo,Tao Zhang,Yiqi Li,Fangfang Xu,Xiangxin Guo
Garnets are promising solid electrolytes for developing solid state Li batteries , owing to their features of relatively high conductivity and stability against lithium metal. However, they show shortcoming of Li penetration through garnets during Li plating and stripping, which limits their practice application. Herein, we present a strategy to solve such problem by coating SnO 2 films on the surfaces of the Li 6 · 4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 pellets. Through conversion reaction of SnO 2 with Li at 200 °C, the nanocomposite layers consisting of crosslinked Li x Sn and Li 2 O are formed between the Li and the Li 6 · 4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 electrolytes. This leads to transition from lithiophobicity to lithiophilicity, thus greatly reducing interfacial resistance from 1100 Ω cm 2 to 25 Ω cm 2 . Furthermore, taking advantage of suppressing volume change of Li x Sn alloy which is about 260%, the intermediate layers maintain integrity under the current densities of 0.2 mA cm −2 for 650 h cycles. In addition, the critical current density of Li/SnO 2 -Li 6.4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 -SnO 2 /Li can be as high as 1.15 mA cm −2 . As a proof-of-concept, this effective interface modification based on conversion reaction method contributes to a useful way of solving the Li/garnet interface problem and promoting the solid state Li batteries development.
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DOI
高影响因子
Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 14
·e202400181
·
IF 3.5
Xingguang Lu,Yuanyuan Ren,Daming Chen,Xiaolong Guo,De Li,Yong Chen
In Li-ion batteries, the origin of memory effect in Al-doped Li 4 Ti 5 O 12 has been revealed as the reversible Al-ion switching between 8a and 16c sites in the spinel structure, but it is still not clear about that for olivine LiFePO 4 , which is one of the most important cathode materials. In this work, a series of Na-doped and Ti-doped LiFePO 4 are prepared in a high-temperature solid-state method, electrochemically investigated in Li-ion batteries and characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Magic-Angle-Spinning Nuclear Magnetic Resonance (MAS NMR). Compared with non-doped LiFePO 4 , the Ti doping can simultaneously suppress the memory effect and the Li−Fe anti-site, while they are simultaneously enhanced by the Na doping. Meanwhile, the Ti doping improves the electrochemical performance of LiFePO 4 , opposite to the Na doping. Accordingly, a schematic diagram of phase transition is proposed to interpret the memory effect of LiFePO 4 , in which the memory effect is attributed to the defect of Li−Fe anti-site.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 33
·17056-17064
·
IF 11.301
Xin-Yu Hu,Pan Xu,Shengwen Deng,Jie Lei,Xiaodong Lin,Qi-Hui Wu,Mingsen Zheng,Quanfeng Dong
Lithium (Li) is a metallic element possessing the most negative electrode potential and the lowest electrochemical equivalent, which make it one of the key materials for the development of the next-generation Li batteries with high specific energy. However, the heterogeneous deposition, volume expansion, solid-electrolyte interphase (SEI) fracture, and high reactivity of metallic Li make its commercialized development difficult. Herein, a novel polyaniline (PANI) decorated three-dimensional (3D) copper mesh (3DCMP) skeleton for a Li metal anode is proposed, which was prepared by in situ polymerizing aniline on the surface of a copper mesh (3DCM). The lithiophilic PANI micro-sheets could induce ordered Li deposition on the mesh and facilitate the formation of a more available SEI film, which could effectively alleviate the formation of Li dendrites and highly promote the utilization of Li during long-term cycling. The symmetrical-cell displayed an excellent Li plating/stripping performance, in which it maintained an overpotential of less than 20 mV at a current density of 2 mA cm−2 over 4000 h. Furthermore, the full-cell coupled with the LiFePO4 cathode exhibited a high capacity retention of 84.8% at 4C after 550 cycles and when coupled with the rGO/S cathode exhibited a capacity retention of 94.4% at 1C after 100 cycles. Hence, it demonstrates a promising potential to be applied in large-scale manufacturing.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
·
电池化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Songsong Liu,Yulin Ma,Jiajun Wang,Pengjian Zuo,Chunyu Du,Geping Yin,Yunzhi Gao
Uniform lithium (Li) deposition and stable interface between anode and electrolyte are crucial factors for realizing the practical application of Li metal anode. Herein, a homogeneous lithium fluoride (LiF) protective layer with many nano slits is constructed on the Li anode by a facile vacuum evaporation method. It can uniformize the Li ion flux at surface of anode via its homogeneity and suppress the violent side reaction between Li and electrolyte via its good compactness. The existence of nano-slits allows the penetration of electrolyte and thus providing sufficient lithium ions transmission channels. Therefore, such a homogeneous LiF layer effectively inhibits the growth of Li dendrites and alleviates the consumption of active Li metal, significantly improving the stability of Li anode during long-term cycles. With the LiF-protected Li anode, the full cell with LiFePO 4 cathode delivers 2.5 times longer lifespan and slower capacity attenuation than control cells. This work highlights significant roles of homogeneous protective layer in stabilizing Li anode and supplies new insights in the design of anode interphase for rechargeable lithium metal batteries (LMBs).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yanhua Zhang,Dongwei Hu,Jiadong Deng,Fei Chen,Qiang Shen,Aikui Li,Lianmeng Zhang,Shijie Dong
Li + transport channel size of garnet-type Li 7 La 3 Z 2 O 12 (LLZO) solid electrolytes is continuously regulated to study its governing of Li + migration in application of all-solid-state batteries. Results show that the Li + migration activation energy decrease with the decrease of Li + transport channel size and then increase with further decrease of Li + transport channel size. With Li + transport channel size of 12.954 Å, the Li + migration activation energy reaches minimum of 0.28 eV. The cyclic voltammogram of Au/Li 7 La 3-X Ca X Zr 2-Y Ta Y O 12 /Li cells show that, with Li + transport channel size of 12.954 Å, the redox peaks is at ±0.23 V, which is more symmetrical and closer to 0 V compared to both larger and smaller Li + transport channel size of 12.961 Å (0.38 V and −0.32 V) and 12.935 Å (0.50 V and −0.40 V). This suggests that LLZO with Li + transport channel size of 12.954 Å has better charge-discharge reversibility of lithium deposition and dissolution and less energy consumption when used as solid electrolyte in all-solid-state lithium batteries.
研究领域:
材料科学
·
电化学
✓ 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）