ChemNanoMat
·
2022
·Vol. 8
·期 10
·e202200324
·
IF 3.82
Hualun Li,Tian Chen,Wei Wang,Guandao Gao,Zhenda Lu
Graphical Developing an effective material to recover lithium from salt-lake brines or used batteries is highly demanded. We report a reduced TiO 2 nanomaterial with numerous lithium vacancies by lithiothermic reaction, exhibiting a high Li-ion adsorption capacity of 26 mg/g from solution. Considering the growing lithium demand and the potential shortage of lithium resource, developing an effective material to recover lithium from salt-lake brines or used batteries is highly needed. Here, we report a reduced TiO 2 nanomaterial (LiTiO 2 ) with numerous lithium vacancies by lithiothermic reaction, which exhibited high adsorption capacity of 26 mg/g from lithium-ion solution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Zhi Zhou,Yiran Li,Mao Xia,Nan Zhou
In this paper, Li 1–x Ti 2 (PO 4 ) 3 /C composites (x = 0, 0.03, 0.05, 0.07) were synthesized by sol-gel approach, and the influence of Li vacancy on electrochemical performance of LiTi 2 (PO 4 ) 3 /C anode for aqueous rechargeable lithium battery was studied. Li vacancy hardly influences the crystal structure and morphology of the composite. Electrochemical measurement results demonstrated that Li 1–x Ti 2 (PO 4 ) 3 /C exhibited better performance compared with pristine LiTi 2 (PO 4 ) 3 /C, and Li 0.95 Ti 2 (PO 4 ) 3 /C has the best properties. Li 0.95 Ti 2 (PO 4 ) 3 /C delivered the discharge capacity of 104.3, 92.6, and 71.8 mAh g − 1 at 0.2, 5, and 20 C (1 C = 150 mA g − 1 ), 4.1, 27.3, and 34.4 mAh g − 1 larger than that of Li 0.95 Ti 2 (PO 4 ) 3 /C at corresponding rates, respectively. After 1000 cycles at 5 C, the discharge capacity retention for Li 0.95 Ti 2 (PO 4 ) 3 /C can reach 75.3%, 15.4% larger than that for LiTi 2 (PO 4 ) 3 /C. Our study reveals that Li vacancy is an efficient method to enhance the electrochemical properties of LiTi 2 (PO 4 ) 3 -based materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Zesen Gao,Shaowei Wang,Futing Sun,Zhiqian Yu,Hucheng Song,Zhanqiang Liu,Haijie Chen
Halides have currently been discovered to be ideal electrolytes for all-solid-state Li batteries (ASSLBs) due to their variability, splendid electrochemical stability, and high Li + conductivities. Here, we studied the electrochemical properties of Li 2-2 x Zn x MgCl 4 ( x = 0–0.3) and their application in ASSLBs. By Zn substitution into the Li site of Li 2 MgCl 4 , the Li + conductivities of Li 1.6 Zn 0.2 MgCl 4 (1.2 × 10 −5 S/cm) at room temperature is two orders higher than that of Li 2 MgCl 4 (1.9 × 10 −7 S/cm). The activation energy is reduced to 0.28 eV for Li 1.6 Zn 0.2 MgCl 4 (Li 2 MgCl 4 is 0.47 eV). We attributed the enhanced electrochemical performance to Li vacancies generated from the Zn substitution. In addition, we fabricated a Li | Li 1.6 Zn 0.2 MgCl 4 | Li cell to appraise the electrochemical performance in the lithiation and stripping. It is demonstrated that Li 1.6 Zn 0.2 MgCl 4 can cycle for 100 h under a current density of 0.07 mA/cm 2 . This study demonstrates that introducing Li vacancy into Li 2 MgCl 4 may be a valid way to promote the electrochemical properties of the halides.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12199-12208
·
IF 2.7
Shaowei Wang,Zesen Gao,Futing Sun,Yan Yang,Lang Tao,Yunluo Wang,Zhiqian Yu,Jianghua Wu,Jingshan Hou,Zhanqiang Liu,Hucheng Song,Haijie Chen
Safety concerns associated with lithium batteries suggest the development of solid-state batteries as a promising variant. In this work, we doped a lithium boracite (Li4B7O12Cl) with Mg2+ to modify the Li+ sites and observed significant improvement in ionic conductivity by two orders of magnitude (from 3.03 × 10−7 S cm−1 to 2.81 × 10−5 S cm−1 at room temperature). We attribute the enhanced ion conductivity to the artificially induced Li vacancies resulting from Mg doping. The as-fabricated symmetrical battery (Li|Li3.6Mg0.2B7O12Cl|Li) exhibited good cycling performance with a stable voltage output even after 60 hours of cycling. The battery showed a coulombic efficiency retention of ∼99.7% after the cycling test. Our work demonstrates that Li4B7O12Cl is a superior solid electrolyte for solid-state batteries and the introduction of Li vacancies can be an efficient approach to greatly improve the ionic conductivity of other electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 21
·2500943
·
IF 12.1
Weizong Wang,Kexuan Jing,He Ma,Kang Liang,Peng Wei,Jiangchuan Liu,Yurong Ren,Qian Zhao,Zhengping Ding
Halide solid-state electrolytes (SSEs) with high ionic conductivity and oxidation stability show significant potentials for the commercialization of all-solid-state batteries (ASSBs). However, their practical applications are limited by poor humidity tolerance and decreased ionic conductivity. Herein, the Li 3/3- x In 1- x M x Cl 5.6 F 0.4 ( M = Hf, Zr, Fe, and Y; x = 0.015, 0.02, 0.025, 0.075, 0.1, 0.125, and 0.15) are synthesized by co-doping Li 3 InCl 6 with M and F ions for high-performance ASSBs. Li 2.98 In 0.98 Hf 0.02 Cl 5.6 F 0.4 achieves the highest ionic conductivity of 1.04 mS cm −1 at room temperature and good humidity tolerance of 87.96% conductivity retention after 24 h exposure. The analysis of experiments combining BVSE and AIMD simulations indicates that it benefits from the enhanced rigid structure that is thermodynamically stable to water caused by Cl − doping with F − and higher Li + vacancies concentration that facilitates Li + conduction generated by In 3+ doping with Hf 4+ . Moreover, an all-solid-state battery ensembled with Li 2.98 In 0.98 Hf 0.02 Cl 5.6 F 0.4 , LiCoO 2 and Li–In alloy, exhibits a high discharge capacity of 83.6 mAh g −1 and 78.6% capacity retention after 100 cycles under 0.5 C at 25 °C. This work provides a reliable strategy for designing advanced halide SSEs for commercial applications in ASSBs by cation–anion co-doping.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态离子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2025
·Vol. 15
·期 35
·2501255
·
IF 26
Mingyi Tang,Jianqi Sun,Caohua He,Chengyi Hou,Qinghong Zhang,Yaogang Li,Zongyi Qin,Kerui Li,Hongzhi Wang
Halide solid electrolytes (SEs) have emerged as promising candidates for all-solid-state batteries (ASSBs) owing to their considerable ionic conductivity, mechanical deformability, and compatibility with high-voltage cathodes. However, the conventional equimolar substitution strategy for developing halide SEs has limitations, as it fails to simultaneously ensure the presence of abundant vacancies and mobile Li-ions, which are two critical factors governing ionic conductivity. Herein, a non-equimolar substitution strategy is adopted to design a Li and vacancy co-enriched Li 2 Zr 0.75 Ta 0.2 Cl 6 with high ionic conductivity (1.74 mS cm −1 ) and compatibility with high-voltage Ni-rich cathode. Specifically, more Zr 4+ is substituted with less Ta 5+ to generate Zr-vacancies without depleting Li-ion content while maintaining charge neutrality. Under the Li-rich state, abundant Zr-vacancies provide additional Li-ion migration pathways within the non-Li-centered octahedral framework and promote uniform and efficient Li-ion transport. ASSBs assembled with single-crystalline LiNi 0.8 Co 0.1 Mn 0.1 O 2 (scNCM811) cathode demonstrate exceptional cycling stability with high-capacity retention (80.0% over 7800 cycles) and maintain stable cycling over 12 000 cycles at a high rate of 5 C. Notably, even under high loading conditions (20.62 mg cm −2 scNCM811), the ASSBs maintained a capacity retention of 80.8% over 800 cycles and 70.1% over 2300 cycles at a high rate of 1 C.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
离子导体
✓ 已验证
产品关联
DOI
高影响因子
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