Nanosheets-in-nanotube Co3O4-carbon array design enables stable Li-ion storage

Authors

Dayi Guo, Inner Mongolia University of Technology
Lu Pan, Beijing Jiaotong University
Jianmin Hao, Inner Mongolia University of Technology
Limin Han, Inner Mongolia University of Technology
Ding Yi, Beijing Jiaotong University
Yajing Wang, Beijing Jiaotong University
Yijun Yang, Beijing Jiaotong University
Yoshio Bando, University of WollongongFollow
Xi Wang, Beijing Jiaotong University

RIS ID

134467

Publication Details

Guo, D., Pan, L., Hao, J., Han, L., Yi, D., Wang, Y., Yang, Y., Bando, Y. & Wang, X. (2019). Nanosheets-in-nanotube Co3O4-carbon array design enables stable Li-ion storage. Carbon, 147 501-509.

Abstract

Carbon composite products with different structures have been developed and used as anode for lithium-ion batteries due to the superior elasticity of carbon, which can keep the morphology integrity of the electrode materials in the process of the multiple cycles. Herein, a novel structure of nanosheets-in-nanotube Co 3 O 4 /carbon arrays is fabricated by the method of modified chemical vapor deposition (CVD). The carbon nanotube (CNT) layer acting as an outside coater can efficiently prevent the electrode from fragmentation and consequently ensure its shape integrity. The specific structure shows the ultra-stable cycle life (850 mAh g −1 after 200 cycles at 0.5C) and high rate capability (694 mAh g −1 at 2C). The favorable electrochemical properties are contributed to the combination of the wrapped elastic carbon and the enclosed Co 3 O 4 nanosheets in the lithiation process, which is confirmed by an in situ transmission electron microscope.