High Energy Density Single-Crystal NMC/Li6PS5Cl Cathodes for All-Solid-State Lithium-Metal Batteries

被引：91

作者：

Doerrer, Christopher ^{[1
]}

Capone, Isaac ^{[1
]}

Narayanan, Sudarshan ^{[1
]}

Liu, Junliang ^{[1
]}

Grovenor, Chris R. M. ^{[1
,2
]}

Pasta, Mauro ^{[1
,2
]}

Grant, Patrick S. ^{[1
,2
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Faraday Inst, Quad One, Didcot OX11 0RA, Oxon, England

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 31期

基金：

英国工程与自然科学研究理事会;

关键词：

solid-state battery; sulfide electrolyte; composite cathode; single-crystal NMC; interfacial contact; volume expansion; stack pressure; pressure dependence; ION; ELECTROLYTES; PRESSURE;

D O I：

10.1021/acsami.1c07952

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To match the high capacity of metallic anodes, all-solid-state batteries require high energy density, long-lasting composite cathodes such as Ni-Mn-Co (NMC)-based lithium oxides mixed with a solid-state electrolyte (SSE). However in practice, cathode capacity typically fades due to NMC cracking and increasing NMC/SSE interface debonding because of NMC pulverization, which is only partially mitigated by the application of a high cell pressure during cycling. Using smart processing protocols, we report a single-crystal particulate LiNi0.83Mn0.06Co0.11O2 and Li6PS5Cl SSE composite cathode with outstanding discharge capacity of 210 mA h g(-1) at 30 degrees C. A first cycle coulombic efficiency of >85, and >99% thereafter, was achieved despite a 5.5% volume change during cycling. A near-practical discharge capacity at a high areal capacity of 8.7 mA h cm(-2) was obtained using an asymmetric anode/cathode cycling pressure of only 2.5 MPa/0.2 MPa.

引用

页码：37809 / 37815

页数：7

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