Beyond Doping and Coating: Prospective Strategies for Stable High-Capacity Layered Ni-Rich Cathodes,ACS Energy Letters

当前位置： X-MOL 学术 › ACS Energy Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Beyond Doping and Coating: Prospective Strategies for Stable High-Capacity Layered Ni-Rich Cathodes
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-03-06 , DOI: 10.1021/acsenergylett.0c00191
H. Hohyun Sun ₁ , Hoon-Hee Ryu ₂ , Un-Hyuck Kim ₂ , Jason A. Weeks ₃ , Adam Heller ₁ , Yang-Kook Sun ₂ , C. Buddie Mullins _{1,

3}

Affiliation

This Perspective discusses the prospective strategies for overcoming the stability and capacity trade-off associated with increased Ni content in layered Ni-rich Li[Ni_xCo_yMn_z]O₂ (NCM) and Li[Ni_xCo_yAl_z]O₂ (NCA) cathodes. The Ni-rich NCM and NCA cathodes have largely replaced the LiCoO₂ cathodes in commercial batteries because of their lower cost, higher energy density, good rate capability, and reliability that has been extensively field-tested. Nevertheless, they suffer from microcrack generation along grain boundaries and Ni^3+/4+ reactivity that rapidly deteriorate electrochemical performance. Doping and coating have been efficient strategies in delaying the onset of the damage, but they fail to overcome the degradation. There are, however, alternative strategies that directly counter the inherent degradation through micro- and nanostructural modifications of the Ni-rich NCM and NCA cathodes.

中文翻译：

超越掺杂和涂层：稳定的高容量层状富镍阴极的预期策略

该观点讨论了克服层状富镍Li [Ni _x Co _y Mn _z ] O ₂（NCM）和Li [Ni _x Co _y Al _z ] O中增加的Ni含量所带来的稳定性和容量折衷的预期策略。_2个（NCA）阴极。富镍的NCM和NCA阴极已大大取代了商用电池中的LiCoO ₂阴极，因为它们的低成本，更高的能量密度，良好的倍率能力以及经过广泛测试的可靠性。但是，它们会沿晶界和Ni ^{3 + / 4 +}产生微裂纹。迅速降低电化学性能的反应性。掺杂和涂覆是延迟损伤发作的有效策略，但是它们不能克服降解。但是，有一些替代策略可以通过对富Ni的NCM和NCA阴极进行微观和纳米结构改性来直接应对固有的降解。

更新日期：2020-04-23

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11