Si-doped Li6PS5I
with enhanced conductivity enables superior performance for all-solid-state
lithium batteries

Liang MING; Dan LIU; Qiyue LUO; Chaochao WEI; Chen LIU; Ziling JIANG; Zhongkai WU; Lin LI; Long ZHANG; Shijie CHENG; Chuang YU

doi:10.1016/j.cclet.2023.109387

Si-doped Li₆PS₅I with enhanced conductivity enables superior performance for all-solid-state lithium batteries

Liang MING
, Dan LIU^*
, Qiyue LUO
, Chaochao WEI
, Chen LIU^*
, Ziling JIANG
, Zhongkai WU
, Lin LI
, Long ZHANG
, Shijie CHENG
, Chuang YU

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

22 Citations (Scopus)

Abstract

Lithium argyrodites Li₆PS₅X (X = Cl, Br, I) show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode compatibility. However, the relatively low conductivity of Li₆PS₅I (10⁻⁶ mS/cm) compared to the other two compositions limits its applications. Herein, Si-doped Li_6.5P_0.5Si_0.5S₅I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/cm. Structural characterization proves the increase due to the anion disorder and volume expansion caused by Si-doping. However, the poor interfacial stability between layered oxide cathode LiNi_0.6Co_0.2Mn_0.2O₂ and Li_6.5P_0.5Si_0.5S₅I inhibits its battery performance. By introducing Li₃InCl₆ electrolyte in the configuration, the corresponding battery delivers high initial discharge capacity of 150.2 mAh/g and superior cyclability during 250 cycles at 0.5 C. This work offers design strategy to obtain Li₆PS₅I-based electrolytes for high performance solid-state batteries.

Original language	English
Article number	109387
Journal	Chinese Chemical Letters
Volume	35
Issue number	10
Early online date	14 Dec 2023
DOIs	https://doi.org/10.1016/j.cclet.2023.109387
Publication status	Published - Oct 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024

Funding

This work was supported by the National Key Research and Development Program (No. 2021YFB2400300). This work is also supported by the National Natural Science Foundation of China (No. 52177214) and the National Key Research and Development Program (No. 2021YFB2500200) and China Fujian Energy Devices Science and Technology Innovation Laboratory Open Fund (No. 21C-OP202211). We gratefully acknowledge the Analytical and Testing Center of HUST for us to use the facilities.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

All-solid-state lithium batteries
Argyrodite electrolyte
Electrochemical performance
Li6.5P0.5Si0.5S5I
Stability

Access to Document

10.1016/j.cclet.2023.109387

Cite this

@article{2ba1308d63e04a5aa4dcddd876d57318,

title = "Si-doped Li6PS5I with enhanced conductivity enables superior performance for all-solid-state lithium batteries",

abstract = "Lithium argyrodites Li6PS5X (X = Cl, Br, I) show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode compatibility. However, the relatively low conductivity of Li6PS5I (10−6 mS/cm) compared to the other two compositions limits its applications. Herein, Si-doped Li6.5P0.5Si0.5S5I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/cm. Structural characterization proves the increase due to the anion disorder and volume expansion caused by Si-doping. However, the poor interfacial stability between layered oxide cathode LiNi0.6Co0.2Mn0.2O2 and Li6.5P0.5Si0.5S5I inhibits its battery performance. By introducing Li3InCl6 electrolyte in the configuration, the corresponding battery delivers high initial discharge capacity of 150.2 mAh/g and superior cyclability during 250 cycles at 0.5 C. This work offers design strategy to obtain Li6PS5I-based electrolytes for high performance solid-state batteries.",

keywords = "All-solid-state lithium batteries, Argyrodite electrolyte, Electrochemical performance, Li6.5P0.5Si0.5S5I, Stability",

author = "Liang MING and Dan LIU and Qiyue LUO and Chaochao WEI and Chen LIU and Ziling JIANG and Zhongkai WU and Lin LI and Long ZHANG and Shijie CHENG and Chuang YU",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = oct,

doi = "10.1016/j.cclet.2023.109387",

language = "English",

volume = "35",

journal = "Chinese Chemical Letters",

issn = "1001-8417",

publisher = "Elsevier B.V.",

number = "10",

}

TY - JOUR

T1 - Si-doped Li6PS5I with enhanced conductivity enables superior performance for all-solid-state lithium batteries

AU - MING, Liang

AU - LIU, Dan

AU - LUO, Qiyue

AU - WEI, Chaochao

AU - LIU, Chen

AU - JIANG, Ziling

AU - WU, Zhongkai

AU - LI, Lin

AU - ZHANG, Long

AU - CHENG, Shijie

AU - YU, Chuang

PY - 2024/10

Y1 - 2024/10

N2 - Lithium argyrodites Li6PS5X (X = Cl, Br, I) show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode compatibility. However, the relatively low conductivity of Li6PS5I (10−6 mS/cm) compared to the other two compositions limits its applications. Herein, Si-doped Li6.5P0.5Si0.5S5I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/cm. Structural characterization proves the increase due to the anion disorder and volume expansion caused by Si-doping. However, the poor interfacial stability between layered oxide cathode LiNi0.6Co0.2Mn0.2O2 and Li6.5P0.5Si0.5S5I inhibits its battery performance. By introducing Li3InCl6 electrolyte in the configuration, the corresponding battery delivers high initial discharge capacity of 150.2 mAh/g and superior cyclability during 250 cycles at 0.5 C. This work offers design strategy to obtain Li6PS5I-based electrolytes for high performance solid-state batteries.

AB - Lithium argyrodites Li6PS5X (X = Cl, Br, I) show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode compatibility. However, the relatively low conductivity of Li6PS5I (10−6 mS/cm) compared to the other two compositions limits its applications. Herein, Si-doped Li6.5P0.5Si0.5S5I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/cm. Structural characterization proves the increase due to the anion disorder and volume expansion caused by Si-doping. However, the poor interfacial stability between layered oxide cathode LiNi0.6Co0.2Mn0.2O2 and Li6.5P0.5Si0.5S5I inhibits its battery performance. By introducing Li3InCl6 electrolyte in the configuration, the corresponding battery delivers high initial discharge capacity of 150.2 mAh/g and superior cyclability during 250 cycles at 0.5 C. This work offers design strategy to obtain Li6PS5I-based electrolytes for high performance solid-state batteries.

KW - All-solid-state lithium batteries

KW - Argyrodite electrolyte

KW - Electrochemical performance

KW - Li6.5P0.5Si0.5S5I

KW - Stability

UR - https://www.scopus.com/pages/publications/85198217911

U2 - 10.1016/j.cclet.2023.109387

DO - 10.1016/j.cclet.2023.109387

M3 - Journal Article (refereed)

AN - SCOPUS:85198217911

SN - 1001-8417

VL - 35

JO - Chinese Chemical Letters

JF - Chinese Chemical Letters

IS - 10

M1 - 109387

ER -