Design of a 3D-Porous Structure with Residual Carbon for High-Performance Ni-Rich Cathode Materials

Hang Dong; Guobiao Liu; Shaomin Li; Sixu Deng; Yanhua Cui; Heng Liu; Hao Liu; Xueliang Sun

doi:10.1021/acsami.8b17800

Design of a 3D-Porous Structure with Residual Carbon for High-Performance Ni-Rich Cathode Materials

ACS Appl Mater Interfaces. 2019 Jan 16;11(2):2500-2506. doi: 10.1021/acsami.8b17800. Epub 2018 Dec 31.

Authors

Hang Dong^{1

2}, Guobiao Liu³, Shaomin Li¹, Sixu Deng⁴, Yanhua Cui⁵, Heng Liu², Hao Liu¹, Xueliang Sun⁴

Affiliations

¹ Chengdu Green Energy and Green Manufacturing Technology R&D Center, Chengdu Development Center of Science and Technology , China Academy of Engineering Physics , Chengdu 610200 , China.
² College of Materials Science and Engineering , Sichuan University , Chengdu 610064 , China.
³ Department of Materials Science , Sichuan Engineering Technical College , Deyang 618000 , China.
⁴ Department of Mechanical and Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada.
⁵ Institute of Electronic Engineering , China Academy of Engineering Physics , Mianyang 621000 , PR China.

PMID: 30507137
DOI: 10.1021/acsami.8b17800

Abstract

Recently, LiNi_0.8Co_0.1Mn_0.1O₂ has drawn much attention because of its high energy density. Here, 3D-porous LiNi_0.8Co_0.1Mn_0.1O₂ and the one with residual carbon have been synthesized using a resorcinol-formaldehyde-assisted sol-gel approach. Scanning electron microscopy images verify that the synthesized LiNi_0.8Co_0.1Mn_0.1O₂ possesses a 3D-porous morphology. X-ray photoelectron spectroscopy analysis and transmission electron microscopy-mapping images indicate the existence of residual carbon in the secondary particle of 3D-porous LiNi_0.8Co_0.1Mn_0.1O₂. Furthermore, 3D-porous LiNi_0.8Co_0.1Mn_0.1O₂ with residual carbon exhibits outstanding electrochemical properties. At a current density of 1900 mA g^-1, the 3D-porous LiNi_0.8Co_0.1Mn_0.1O₂ with residual carbon can still deliver a reversible capacity of 113 . Moreover, after 150 cycles at 0.2 C, the capacity retention of 3D-porous LiNi_0.8Co_0.1Mn_0.1O₂ with residual carbon reaches to 95%. The excellent electrochemical properties can be ascribed to the unique 3D-porous morphology and residual carbon in the secondary particle.

Keywords: 3D-porous morphology; LiNi0.8Co0.1Mn0.1O2; Ni-rich cathode material; lithium-ion battery; residual carbon; sol−gel.