Improved Electrochemical Performance of Li-Rich Layered Oxide Cathodes Enabled by a Two-Step Heat Treatment

doi:10.1021/acsami.1c00723

KMS > 物质科学与技术学院

Improved Electrochemical Performance of Li-Rich Layered Oxide Cathodes Enabled by a Two-Step Heat Treatment

Nie, Lu

; Liang, Chao

; Chen, Shaojie

; He, Yingjie

; Liu, Weiyan

; Zhao, Haojie

; Gao, Tianyi

; Sun, Zhetao

; Hu, Qilin

; Zhang, Yue

; Yu, Yi

; Liu, Wei

2021-03-24

发表期刊

ACS APPLIED MATERIALS & INTERFACES (IF:8.3[JCR-2023],8.7[5-Year])

ISSN

1944-8244

卷号

13 期号:11 页码:13281-13288

发表状态

已发表

DOI

10.1021/acsami.1c00723

摘要

Lithium-rich layered oxide cathodes with high specific energy have become one of the most popular cathode materials for high-performance lithium-ion batteries. However, spinel phase formation due to the migration of transition metals and the release of lattice oxygen leads to the degradation of electrochemical performance. Here, we develop a synthesis approach for Li-rich layered oxide cathodes by a two-step heattreatment process, which includes precursor calcination and pellet sintering. Compared with the sample prepared by the traditional one-step calcination, the oxide particles prepared by the two-step heat treatment show increased grain size from 217 to 425 nm. The Li-rich layered oxide cathodes with larger crystal grains indicate a mitigated formation of spinel phase and reduced voltage decay, which result in improved specific capacity, cycle stability, and rate capability. In addition, the thermal stability of the oxides is also improved. The improved electrochemical performance is because of the large single grains having a reduced contact area with a liquid electrolyte and the stable crystal lattice during cycling. Our strategy not only provides a simple and effective way to enhance the stability of the Li-rich layered oxide cathodes but also extends to the preparation of oxide powders with large grains.

关键词

lithium-rich layered oxides grain size spinel phas

收录类别

SCI ; SCIE ; EI

语种

英语

WOS记录号

WOS:000634759500064

出版者

AMER CHEMICAL SOC

原始文献类型

Article

引用统计

正在获取...

文献类型

期刊论文

条目标识符

https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/126202

专题

物质科学与技术学院
物质科学与技术学院_PI研究组_于奕组
物质科学与技术学院_PI研究组_刘巍组
物质科学与技术学院_公共科研平台_物质科学电镜平台
物质科学与技术学院_硕士生
物质科学与技术学院_本科生
物质科学与技术学院_博士生

通讯作者

Liu, Weiyan; Liu, Wei

作者单位

School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

第一作者单位

物质科学与技术学院

通讯作者单位

物质科学与技术学院

第一作者的第一单位

物质科学与技术学院

推荐引用方式
GB/T 7714

Nie, Lu,Liang, Chao,Chen, Shaojie,et al. Improved Electrochemical Performance of Li-Rich Layered Oxide Cathodes Enabled by a Two-Step Heat Treatment[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13(11):13281-13288.

APA

Nie, Lu.,Liang, Chao.,Chen, Shaojie.,He, Yingjie.,Liu, Weiyan.,...&Liu, Wei.(2021).Improved Electrochemical Performance of Li-Rich Layered Oxide Cathodes Enabled by a Two-Step Heat Treatment.ACS APPLIED MATERIALS & INTERFACES,13(11),13281-13288.

MLA

Nie, Lu,et al."Improved Electrochemical Performance of Li-Rich Layered Oxide Cathodes Enabled by a Two-Step Heat Treatment".ACS APPLIED MATERIALS & INTERFACES 13.11(2021):13281-13288.