Enhancing Cell Performance of Lithium-Rich Manganese-Based Materials via Tailoring Crystalline States of a Coating Layer

Zhenjiang He; Jingyi Li; Ziyan Luo; Zhiwei Zhou; Xiangkang Jiang; Junchao Zheng; Yunjiao Li; Jing Mao; Kehua Dai; Cheng Yan; Zhaoming Sun

doi:10.1021/acsami.1c11180

Enhancing Cell Performance of Lithium-Rich Manganese-Based Materials via Tailoring Crystalline States of a Coating Layer

ACS Appl Mater Interfaces. 2021 Oct 20;13(41):49390-49401. doi: 10.1021/acsami.1c11180. Epub 2021 Oct 5.

Authors

Zhenjiang He^{1

2

3}, Jingyi Li^{1

2

3}, Ziyan Luo^{1

2

3}, Zhiwei Zhou^{1

2

3}, Xiangkang Jiang¹, Junchao Zheng^{1

2

3}, Yunjiao Li^{1

2

3}, Jing Mao⁴, Kehua Dai⁵, Cheng Yan⁶, Zhaoming Sun^{1

2

3}

Affiliations

¹ School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China.
² National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals, Central South University, Changsha 410083, China.
³ Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China.
⁴ School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China.
⁵ College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
⁶ School of Mechanical, Medical and Process Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia.

PMID: 34609832
DOI: 10.1021/acsami.1c11180

Abstract

Li-rich Mn-based-layered oxides are considered to be the most felicitous cathode material candidates for commercial application of lithium-ion batteries on account of high energy density. Nevertheless, defects containing an unsatisfactory initial Coulombic efficiency and rapid voltage decay seriously impede their practical utilization. Herein, a coating layer with three distinct crystalline states are employed as a coating layer to modify Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂, respectively, and the effects of coating layers with distinct crystalline states on the crystal structure, diffusion kinetics, and cell performance of host materials are further explored. A coating layer with high crystallinity enables mitigatory voltage decay and better cyclic stability of materials, while a coating layer with planar defects facilitates Li⁺ transfer and enhances the rate performance of materials. Consequently, optimizing the crystalline state of coating substances is critical for preferable surface modification.

Keywords: Li2ZrO3 coating; Li[Li0.2Mn0.54Ni0.13Co0.13]O2; crystalline state; defect; lithium-ion battery.