Citation: Liming Zhang, Chenjie Lou, Shuaika Liang, Wei Xia, Rui Wang, Longfei Li, Chengyu Fu, Mingxue Tang, Rong Xiang, Wei Wang, Yichun Xu, Hongfa Xiang, Xuyong Feng. Boosting ionic conductivity in Li_xAlCl_3-xO_x solid electrolytes through anion-mixing-engineered ion diffusion channels[J]. Chinese Chemical Letters, ;2026, 37(10): 111558. doi: 10.1016/j.cclet.2025.111558 shu

Boosting ionic conductivity in Li_xAlCl_3-xO_x solid electrolytes through anion-mixing-engineered ion diffusion channels

Liming Zhang ^{a, 1} ,
Chenjie Lou ^{b, 1} ,
Shuaika Liang ^{c, 1} ,
Wei Xia ^c ,
Rui Wang ^d ,
Longfei Li ^a ,
Chengyu Fu ^a ,
Mingxue Tang ^b ,
Rong Xiang ^e ,
Wei Wang ^f ,
Yichun Xu ^{g, *,} ,
Hongfa Xiang ^{a, *,} ,
Xuyong Feng ^{a, *,}

a.
School of Materials Science and Engineering, Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China
b.
Center for High Pressure Science and Technology Advanced Research, Beijing 100193, China
c.
Ningbo Key Laboratory of All-Solid-State Battery, Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo 315201, China
d.
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
e.
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang Provincial Key Laboratory for Atomic-level Manufacturing, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
f.
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fuzhou 360002, China
g.
Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

xuyichun@issp.ac.cn

hfxiang@hfut.edu.cn

2021800026@hfut.edu.cn

Received Date: 28 May 2025
Revised Date: 4 July 2025
Accepted Date: 8 July 2025
Available Online: 8 July 2025

Figures(4)

Solid-state electrolytes composed of earth-abundant elements offer significant cost advantages for large-scale energy storage applications. However, their widespread adoption is hindered by inherently low ionic conductivity. In this study, we report a low-cost solid-state electrolyte, Li_xAlCl_3-xO_x (0.6 ≤ x ≤ 1.1), with dramatically enhanced ionic conductivity achieved through the construction of fast ion-conducting channels via an innovative anion mixing strategy. First-principles calculations and experimental characterizations reveal that the Cl⁻/O²⁻ anion mixing expands the distribution of Li⁺ ions within the lattice while reducing the distance between adjacent sites. This structural optimization results in a low Li⁺ migration activation energy of 0.3 eV and elevates the ionic conductivity from 10⁻³ mS/cm to 1.5 mS/cm. Furthermore, the Cl^-/O²^- mixing synergistically combines the advantages of both anions, endowing the Li_xAlCl_3-xO_x electrolyte with high-voltage stability (up to 3.96 V vs. Li⁺/Li), robust interfacial compatibility, and air stability. When integrated into all-solid-state batteries with a LiCoO₂Li_0.8AlCl_2.2O_0.8Li₆PS₅ClLi-Si configuration, it delivers an initial capacity of 127 mAh/g and retains 94.4% of its discharge capacity after 180 cycles at 0.3 C.
- All solid-state batteries,
- Mix anion solid state electrolytes,
- Halide,
- Solid state NMR,
- Neutron pair distribution function
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通讯作者: 陈斌, bchen63@163.com

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Boosting ionic conductivity in LixAlCl3-xOx solid electrolytes through anion-mixing-engineered ion diffusion channels

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通讯作者: 陈斌, bchen63@163.com

Boosting ionic conductivity in Li_xAlCl_3-xO_x solid electrolytes through anion-mixing-engineered ion diffusion channels