利用过氧化氢溶液洗涤系统改善LiNi0.82Co0.11Mn0.07O2正极材料的高温循环稳定性和倍率性能

IF 0.7 4区材料科学 Q4 ELECTROCHEMISTRY

Journal of New Materials For Electrochemical Systems Pub Date : 2022-06-10 DOI:10.14447/jnmes.v25i2.a02

Seon-Jin Lee, Hyun-Ju Jang, J. Son

{"title":"利用过氧化氢溶液洗涤系统改善LiNi0.82Co0.11Mn0.07O2正极材料的高温循环稳定性和倍率性能","authors":"Seon-Jin Lee, Hyun-Ju Jang, J. Son","doi":"10.14447/jnmes.v25i2.a02","DOIUrl":null,"url":null,"abstract":"In this study, for the removal of residual lithium (Li2CO3,LiOH) from a nickel-rich cathode material surface, LiNi0.82Co0.11Mn0.07O2 cathode materials were washed with an aqueous solution of hydrogen peroxide (H2O2).H2O2 ( pH6.04), a weak acid, can easily decompose Li2CO3 and LiOH as an oxidizing agent. On titration of residual lithium, the amounts of LiOH and Li2CO3 are 390 and 605ppm,25 - and 47 -times lower, after H2O2 washing compared to 10,296 and 28,440ppm, respectively, in case of cathode materials before washing. On DSC thermal analysis, the peak temperature and calorific value of the cathode material washed with H2O2 were 245.5∘C and 602.0 J/g, respectively, whereas the bare case was 208.6∘C and 1,071 J/g, respectively. Therefore, H2O2-washed LiNi0.82Co0.11Mn0.07O2 cathode materials had higher capacity heat retention after 100 cycles at 55∘C(85.6% at 0.5C) than the bare LiNi0.82Co0.11Mn0.07O2 cathode materials (78.6% at 0.5C).","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improving High-Temperature Cycle Stability and Rate Performance of LiNi0.82Co0.11Mn0.07O2 Cathode Materials Using Hydrogen Peroxide Solution Washing System\",\"authors\":\"Seon-Jin Lee, Hyun-Ju Jang, J. Son\",\"doi\":\"10.14447/jnmes.v25i2.a02\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this study, for the removal of residual lithium (Li2CO3,LiOH) from a nickel-rich cathode material surface, LiNi0.82Co0.11Mn0.07O2 cathode materials were washed with an aqueous solution of hydrogen peroxide (H2O2).H2O2 ( pH6.04), a weak acid, can easily decompose Li2CO3 and LiOH as an oxidizing agent. On titration of residual lithium, the amounts of LiOH and Li2CO3 are 390 and 605ppm,25 - and 47 -times lower, after H2O2 washing compared to 10,296 and 28,440ppm, respectively, in case of cathode materials before washing. On DSC thermal analysis, the peak temperature and calorific value of the cathode material washed with H2O2 were 245.5∘C and 602.0 J/g, respectively, whereas the bare case was 208.6∘C and 1,071 J/g, respectively. Therefore, H2O2-washed LiNi0.82Co0.11Mn0.07O2 cathode materials had higher capacity heat retention after 100 cycles at 55∘C(85.6% at 0.5C) than the bare LiNi0.82Co0.11Mn0.07O2 cathode materials (78.6% at 0.5C).\",\"PeriodicalId\":16447,\"journal\":{\"name\":\"Journal of New Materials For Electrochemical Systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2022-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of New Materials For Electrochemical Systems\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.14447/jnmes.v25i2.a02\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of New Materials For Electrochemical Systems","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.14447/jnmes.v25i2.a02","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}

引用次数: 0

摘要

在本研究中，为了去除富镍正极材料表面残留的锂（Li2CO3，LiOH），用过氧化氢（H2O2）水溶液洗涤LiNi0.82Co0.11Mn0.07O2正极材料。H2O2（pH6.04）是一种弱酸，可以很容易地分解Li2CO3和LiOH作为氧化剂。在剩余锂的滴定中，在H2O2洗涤后，LiOH和Li2CO3的量分别为390和605ppm，比洗涤前阴极材料的10296和28440ppm低25倍和47倍。在DSC热分析中，用H2O2洗涤的阴极材料的峰值温度和热值分别为245.5℃和602.0 J/g，而裸露情况下分别为208.6℃和1071 J/g。因此，H2O2洗涤的LiNi0.82Co0.11Mn0.07O2阴极材料在55℃下循环100次后（在0.5℃下为85.6%）比裸LiNi0.82Co0.11Mn.07O2阴极材料（在0.5摄氏度下为78.6%）具有更高的容量保热性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Improving High-Temperature Cycle Stability and Rate Performance of LiNi0.82Co0.11Mn0.07O2 Cathode Materials Using Hydrogen Peroxide Solution Washing System

In this study, for the removal of residual lithium (Li2CO3,LiOH) from a nickel-rich cathode material surface, LiNi0.82Co0.11Mn0.07O2 cathode materials were washed with an aqueous solution of hydrogen peroxide (H2O2).H2O2 ( pH6.04), a weak acid, can easily decompose Li2CO3 and LiOH as an oxidizing agent. On titration of residual lithium, the amounts of LiOH and Li2CO3 are 390 and 605ppm,25 - and 47 -times lower, after H2O2 washing compared to 10,296 and 28,440ppm, respectively, in case of cathode materials before washing. On DSC thermal analysis, the peak temperature and calorific value of the cathode material washed with H2O2 were 245.5∘C and 602.0 J/g, respectively, whereas the bare case was 208.6∘C and 1,071 J/g, respectively. Therefore, H2O2-washed LiNi0.82Co0.11Mn0.07O2 cathode materials had higher capacity heat retention after 100 cycles at 55∘C(85.6% at 0.5C) than the bare LiNi0.82Co0.11Mn0.07O2 cathode materials (78.6% at 0.5C).

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Journal of New Materials For Electrochemical Systems ELECTROCHEMISTRY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： This international Journal is intended for the publication of original work, both analytical and experimental, and of reviews and commercial aspects related to the field of New Materials for Electrochemical Systems. The emphasis will be on research both of a fundamental and an applied nature in various aspects of the development of new materials in electrochemical systems.