Fine-Tuned Synthesis for Reducing Residual Lithium in Ni-Rich Cathode Materials for Lithium-Ion Batteries

被引：0

作者：

Shim, Jae-Hyun ^{[1
]}

Jung, Min-Hyoung ^{[2
]}

Yang, Min-Ji ^{[1
]}

Lee, Jaehan ^{[3
]}

Kim, In ^{[3
]}

Ahn, Young Ju ^{[4
]}

Kim, Young-Min ^{[2
]}

Lee, Sanghun ^{[5
]}

机构：

[1] Dongshin Univ, Dept Battery Sci & Engn, Naju 58245, South Korea

[2] Sungkyunkwan Univ SKKU, Dept Energy Sci, Suwon 16419, South Korea

[3] VinES Energy Solut JSC, Hanoi 100000, Vietnam

[4] Hongik Univ, Dept Mech & Design Engn, Sejong 30016, South Korea

[5] Gachon Univ, Dept Chem, Seongnam 13120, South Korea

来源：

ACS APPLIED ENERGY MATERIALS | 2023年 / 6卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

lithium-ion battery; residual lithium; Ni-richcathode; washing; post-heat treatment; LAYERED OXIDE CATHODES; ELECTROCHEMICAL PERFORMANCE; LINI0.8CO0.1MN0.1O2; LICOO2;

D O I：

10.1021/acsaem.3c00400

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Incidentally generated residual lithium on the surfaceduring thesynthesis of Ni-rich cathode materials for lithium-ion batteries hasbeen considered one of the most serious problems to be solved. Inthis work, a suitable condition for simple washing and post-heat treatmentwith additional lithium salt process for preparing LiNi0.8Co0.1Mn0.1O2 is optimized througha systematic evaluation. By varying amount of additional lithium salt,the most appropriate input is found to be 5 wt % in terms of electrochemicalperformance, such as initial capacity, capacity retention, and ratecapability. In addition, it is verified by several techniques thatit has the ideal composition (lithium/transition metal = 1:1) andthe stable structure of R3 m. From electrochemical impedance spectroscopy, it is found that thegood performance of the cell assembled using the optimized materialis originated from lowering resistance between the cathode and theelectrolyte.

引用

页码：5952 / 5958

页数：7

共 35 条

[1] Renovation of LiCoO2 with outstanding cycling stability by thermal treatment with Li2CO3 from spent Li-ion batteries [J].