Equation of state of LiCoO2 under 30 GPa pressure

doi:10.1088/1674-1056/28/1/016402

Abstract

LiCoO₂ is one of the most important cathode materials for high energy density lithium ion batteries. The compressed behavior of LiCoO₂ under high pressure has been investigated using synchrotron radiation x-ray diffraction. It is found that LiCoO₂ maintains hexagonal symmetry up to the maximum pressure of 30.1 GPa without phase transition. The elastic modulus at ambient pressure is 159.5(2.2) GPa and its first derivative is 3.92(0.23). In addition, the high-pressure compression behavior of LiCoO₂ has been studied by first principles calculations. The derived bulk modulus of LiCoO₂ is 141.6 GPa.

Keywords: equation of state high pressure LiCoO₂

Received: 10 September 2018
Revised: 28 October 2018
Accepted manuscript online:

PACS:	64.30.Jk	(Equations of state of nonmetals)
	64.60.-i	(General studies of phase transitions)
	07.35.+k	(High-pressure apparatus; shock tubes; diamond anvil cells)
	61.05.cp	(X-ray diffraction)

Fund:

Project supported by the Program of Education Department of Sichuan Province of China (Grant No. 18ZB0506), the Project of Sichuan University of Arts and Science, China (Grant No. 2017KZ001Z), and Outstanding Talent Introduction Project of Henan Institute of Science and Technology, China (Grant No. 203010617011). This work was performed at 4W2 beamline of Beijing Synchrotron Radiation Facility (BSRF), which was supported by Chinese Academy of Sciences (Grant Nos. KJCX2-SWN03 and KJCX2-SW-N20).

Corresponding Authors: Lun Xiong
E-mail: 1094129778@qq.com

Cite this article:

Yong-Qing Hu(户永清), Lun Xiong(熊伦), Xing-Quan Liu(刘兴泉), Hong-Yuan Zhao(赵红远), Guang-Tao Liu(刘广涛), Li-Gang Bai(白利刚), Wei-Ran Cui(崔巍然), Yu Gong(宫宇), Xiao-Dong Li(李晓东) Equation of state of LiCoO₂ under 30 GPa pressure 2019 Chin. Phys. B 28 016402

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Equation of state of LiCoO₂ under 30 GPa pressure