A novel synthesis strategy to improve cycle stability of LiNi0.8Mn0.1Co0.1O2 at high cut-off voltages through core–shell structuring

Kang Wu; Qi Li; Rongbin Dang; Xin Deng; Minmin Chen; Yu Lin Lee; Xiaoling Xiao; Zhongbo Hu

doi:10.1007/s12274-019-2469-6

Nano Research 2019, 12(10): 2460-2467 https://doi.org/10.1007/s12274-019-2469-6

Research Article | Issue | Published: 03 August 2019

A novel synthesis strategy to improve cycle stability of LiNi_0.8Mn_0.1Co_0.1O₂ at high cut-off voltages through core–shell structuring

Show Author's Information Hide Author's Information Kang Wu^¹<, Qi Li^¹<, Rongbin Dang^¹, Xin Deng^¹, Minmin Chen^¹, Yu Lin Lee^², Xiaoling Xiao^¹(

), Zhongbo Hu^¹(

)

1College of Materials Science and Opto-electronic Technology,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences,Beijing,100049,China;

2Department of Materials, Imperial College London,Royal School of Mines, Exhibition Road,London SW7 2AZ,UK;

^§ Kang Wu and Qi Li contributed equally to this work.

Keywords:

core–shell structure, lithium ion battery, nickel-rich cathode materials, dimethylglyoxime

Topics:

Cathodes Ion batteries Lithium Lithium compounds Manganese compounds Shells (structures)

Cite this article:

Wu K, Li Q, Dang R, et al. A novel synthesis strategy to improve cycle stability of LiNi_0.8Mn_0.1Co_0.1O₂ at high cut-off voltages through core–shell structuring. Nano Research, 2019, 12(10): 2460-2467. https://doi.org/10.1007/s12274-019-2469-6

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Abstract

Nickel-rich cathode materials have attracted considerable interest because of their high specific capacities, voltage ranges, and low cost. However, serious capacity attenuation and poor rate performance limit their application. This study proposes a novel strategy to improve the cycle stability of the nickel-rich LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) layer material by designing core–shell LiNi_0.8Co_0.1Mn_0.1O₂ (CS-NCM811). CS-NCM811 is designed by the characteristic reaction between dimethylglyoxime (C₄H₈N₂O₂) and nickel ion to form Ni(C₄H₇N₂O₂)₂. The CS-NCM811 is characterized with high nickel content in its core and high manganese content on its surface, leading to a high capacity and excellent cycle stability. The capacity retention of CS-NCM811 was 72.8%, much higher than that of NCM811 (47.1%) after 500 cycles at a rate of 5 C. Not only is this method a novel strategy to design high capacity cathode materials but also provides some new insights into the cycle stability of nickel-rich layered cathode materials.

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About this article

A novel synthesis strategy to improve cycle stability of LiNi_0.8Mn_0.1Co_0.1O₂ at high cut-off voltages through core–shell structuring

Show Author's information Hide Author's Information Kang Wu^¹<, Qi Li^¹<, Rongbin Dang^¹, Xin Deng^¹, Minmin Chen^¹, Yu Lin Lee^², Xiaoling Xiao^¹(

), Zhongbo Hu^¹(

)

1College of Materials Science and Opto-electronic Technology,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences,Beijing,100049,China;

2Department of Materials, Imperial College London,Royal School of Mines, Exhibition Road,London SW7 2AZ,UK;

^§ Kang Wu and Qi Li contributed equally to this work.

Abstract

Keywords: core–shell structure, lithium ion battery, nickel-rich cathode materials, dimethylglyoxime

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Acknowledgements

Publication history

Received: 19 May 2019

Revised: 13 June 2019

Accepted: 27 June 2019

Published: 03 August 2019

Issue date: October 2019

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Acknowledgements

This work was supported by the Youth Innovation Promotion Association CAS (No. 2016152), the University of Chinese Academy of Sciences, and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (No. ZDKYYQ20170001).