Reduced Graphene Oxide-Wrapped Novel CoIn2S4 Spinel Composite Anode Materials for Li-ion Batteries

Ting-Yu Lee; Wei-Ren Liu

doi:10.3390/nano12244367

Reduced Graphene Oxide-Wrapped Novel CoIn₂S₄ Spinel Composite Anode Materials for Li-ion Batteries

Nanomaterials (Basel). 2022 Dec 7;12(24):4367. doi: 10.3390/nano12244367.

Authors

Ting-Yu Lee¹, Wei-Ren Liu¹

Affiliation

¹ Department of Chemical Engineering, R&D Center for Membrane Technology, Center for Circular Economy, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 32023, Taiwan.

Abstract

In this study, we proposed a novel CoIn₂S₄/reduced graphene oxide (CoIn₂S₄/rGO) composite anode using a hydrothermal method. By introducing electronic-conductive reduced graphene oxide (rGO) to buffer the extreme volume expansion of CoIn₂S₄, we prevented its polysulfide dissolution during the lithiation/de-lithiation processes. After 100 cycles, the pristine CoIn₂S₄ electrode demonstrated poor cycle performance of only 120 mAh/g at a current density of 0.1 A/g. However, the composition-optimized CoIn₂S₄/rGO composite anode demonstrated a reversible capacity of 580 mAh/g for 100 cycles, which was an improvement of 4.83 times. In addition, the ex situ XRD measurements of the CoIn₂S₄/rGO electrode were conducted to determine the reaction mechanism and electrochemical behavior. These results suggest that the as-synthesized CoIn₂S₄/rGO composite anode is a promising anode material for lithium ion batteries.

Keywords: CoIn2S4; anode; lithium-ion battery; reduced graphene oxide; transition metal sulfides.

Grants and funding

The authors gratefully acknowledged to Ministry of Science and Technology, Taiwan, project grant no. MOST 110-2811-E-033-505, 110-2622-M-033-001, 110-2622-E-033-009, 110-2923-E-006-011, 108-E-033-MY3, 110-3116-F-011-002 and 111-2221-E-033-004-MY3.