Stabilization of the surface and lattice structure for LiNi0.83Co0.12Mn0.05O2via B2O3 atomic layer deposition and post-annealing†

IF 3.2 Q2 CHEMISTRY, PHYSICAL
Energy advances Pub Date : 2024-05-22 DOI:10.1039/D4YA00206G
Jiawei Li, Junren Xiang, Ge Yi, Zhijia Hu, Xiao Liu and Rong Chen
{"title":"Stabilization of the surface and lattice structure for LiNi0.83Co0.12Mn0.05O2via B2O3 atomic layer deposition and post-annealing†","authors":"Jiawei Li, Junren Xiang, Ge Yi, Zhijia Hu, Xiao Liu and Rong Chen","doi":"10.1039/D4YA00206G","DOIUrl":null,"url":null,"abstract":"<p >The Ni-rich LiNi<small><sub><em>x</em></sub></small>Co<small><sub><em>y</em></sub></small>Mn<small><sub>1−<em>x</em>−<em>y</em></sub></small>O<small><sub>2</sub></small> cathode (<em>x</em> ≥ 0.6) shows weak rate capability due to its deleterious surface lithium impurities and lattice defects. Herein, uniform ultrathin B<small><sub>2</sub></small>O<small><sub>3</sub></small> coatings built by atomic layer deposition (ALD) are utilized to construct a B<small><sup>3+</sup></small> doped single-crystal LiNi<small><sub>0.83</sub></small>Co<small><sub>0.12</sub></small>Mn<small><sub>0.05</sub></small>O<small><sub>2</sub></small> (SC83) <em>via</em> post-annealing. LiOH is consumed due to reacting with B<small><sub>2</sub></small>O<small><sub>3</sub></small> during the B<small><sub>2</sub></small>O<small><sub>3</sub></small> ALD process, and then B<small><sub>2</sub></small>O<small><sub>3</sub></small> is transformed into B<small><sup>3+</sup></small> doping accompanied by the reduction of Li<small><sub>2</sub></small>CO<small><sub>3</sub></small> during the post-annealing. Surface and bulk characterization results show that B<small><sup>3+</sup></small> tends to diffuse into the bulk of the SC83 during the post-annealing, which expands the <em>a</em> and <em>c</em> axes and reduces the Li<small><sup>+</sup></small>/Ni<small><sup>2+</sup></small> mixing of the SC83. When the B<small><sup>3+</sup></small> content exceeds 0.54 wt%, B<small><sup>3+</sup></small> segregation occurs on the surface of the SC83, which decreases the electronic conductivity of the SC83. B<small><sup>3+</sup></small> doping at the content of 0.54 wt% gives the highest capacity of 177.6 mA h g<small><sup>−1</sup></small> at 1C rate. The B<small><sub>2</sub></small>O<small><sub>3</sub></small> ALD coupled with post-annealing builds a highly electronic and Li<small><sup>+</sup></small> conductive surface and bulk for the SC83, which is the key to the improvement of the rate capability.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00206g?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy advances","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00206g","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

Abstract

The Ni-rich LiNixCoyMn1−xyO2 cathode (x ≥ 0.6) shows weak rate capability due to its deleterious surface lithium impurities and lattice defects. Herein, uniform ultrathin B2O3 coatings built by atomic layer deposition (ALD) are utilized to construct a B3+ doped single-crystal LiNi0.83Co0.12Mn0.05O2 (SC83) via post-annealing. LiOH is consumed due to reacting with B2O3 during the B2O3 ALD process, and then B2O3 is transformed into B3+ doping accompanied by the reduction of Li2CO3 during the post-annealing. Surface and bulk characterization results show that B3+ tends to diffuse into the bulk of the SC83 during the post-annealing, which expands the a and c axes and reduces the Li+/Ni2+ mixing of the SC83. When the B3+ content exceeds 0.54 wt%, B3+ segregation occurs on the surface of the SC83, which decreases the electronic conductivity of the SC83. B3+ doping at the content of 0.54 wt% gives the highest capacity of 177.6 mA h g−1 at 1C rate. The B2O3 ALD coupled with post-annealing builds a highly electronic and Li+ conductive surface and bulk for the SC83, which is the key to the improvement of the rate capability.

Abstract Image

通过 B2O3 原子层沉积和后退火稳定 LiNi0.83Co0.12Mn0.05O2 的表面和晶格结构
富含镍的 LiNixCoyMn1-x-yO2 正极(x ≥ 0.6)因其有害的表面锂杂质和晶格缺陷而显示出较低的速率能力。在这里,利用原子层沉积(ALD)技术形成的均匀超薄 B2O3 涂层,通过后退火构建了掺杂 B3+ 的单晶 LiNi0.83Co0.12Mn0.05O2 (SC83)。在 B2O3 ALD 过程中,LiOH 与 B2O3 反应而被还原,然后在后退火过程中,B2O3 与 Li2CO3 的还原一起转化为 B3+掺杂。表面和块体表征显示,在后退火过程中,B3+趋向于扩散到 SC83 的块体中,从而扩大了 a 轴和 c 轴,降低了 SC83 的 Li+/Ni2+ 混合程度。当 B3+ 含量超过 0.54 wt.‰时,B3+ 会在 SC83 表面发生偏析,从而降低 SC83 的电子电导率。B3+ 掺杂含量为 0.54 重量.‰时,在 1C 速率下的容量最高,为 177.6 mAh/g。B2O3 ALD 与后退火相结合,为 SC83 构建了一个高电子和 Li+ 导电的表面和块体,这是提高速率能力的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
1.80
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信