CoO-Co3O4 heterostructure nanoribbon/RGO sandwich-like composites as anode materials for high performance lithium-ion batteries. (1st July 2017)

• Record Type: Journal Article
• Authors: Sun, Lingna; Deng, Qingwei; Li, Yongliang; Mi, Hongwei; Wang, Suhang; Deng, Libo; Ren, Xiangzhong; Zhang, Peixin
• Is Part Of: Electrochimica acta. Volume 241(2017)
• Page Start: 252
• Page End: 260
• Publication Date: 2017-07-01
• Subjects: Reduced graphene oxide nanosheets -- CoO-Co3O4-RGO -- Sandwich-like -- Anode materials -- Solvothermal; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.04.148
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: CoO-Co3 O4 heterostructure nanoribbons were successfully sandwiched between reduced graphene oxide (RGO) nanosheets through a facile solvothermal method and sintering process, which used directly as the anode material for lithium ion batteries. The as-prepared ultrathin CoO-Co3 O4 nanoribbon/RGO sandwich-like nanostructures (CoO-Co3 O4 -RGO) delivers a reversible capacity of 994 mAh g −1 at a current density of 100 mA g −1 after 200 cycles. Even at a high charge-discharge rate of 1000 mA g −1, CoO-Co3 O4 -RGO still demonstrate a reversible capacity of 395 mAh g −1 after 500 cycles. The rate capability of CoO-Co3 O4 -RGO evaluated by the ratio of capacity at 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 after each 10 cycles was about 1210, 1060, 890, 730, 578, 392 and 915 mAh g −1, respectively. The greatly enhanced performances for CoO-Co3 O4 -RGO may be ascribed to the synergistic effects: The multicomponent generates hybridizing advantages; The mutual influence of both CoO-Co3 O4 nanoribbons and RGO nanosheets decreases the aggregation; The two-dimensional (2D) nanoribbons with the short lithium ion diffusion and 2D RGO sheets as conductive network built an efficient three dimensional (3D) storage active material.