Graphene‐Encapsulated Nanosheet‐Assembled Zinc–Nickel–Cobalt Oxide Microspheres for Enhanced Lithium Storage. Issue 2 (16th December 2015)

• Record Type: Journal Article
• Authors: Zhang, Qiaobao; Chen, Huixin; Han, Xiang; Cai, Junjie; Yang, Yong; Liu, Meilin; Zhang, Kaili
• Is Part Of: ChemSusChem. Volume 9:Issue 2(2016:Jan.)
• Page Start: 186
• Page End: 196
• Publication Date: 2015-12-16
• Subjects: electrochemistry -- graphene -- lithium -- nanostructures -- microporous materials; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201501151
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The appropriate combination of hierarchical transition‐metal oxide (TMO) micro‐/nanostructures constructed from porous nanobuilding blocks with graphene sheets (GNS) in a core/shell geometry is highly desirable for high‐performance lithium‐ion batteries (LIBs). A facile and scalable process for the fabrication of 3D hierarchical porous zinc–nickel–cobalt oxide (ZNCO) microspheres constructed from porous ultrathin nanosheets encapsulated by GNS to form a core/shell geometry is reported for improved electrochemical performance of the TMOs as an anode in LIBs. By virtue of their intriguing structural features, the produced ZNCO/GNS core/shell hybrids exhibit an outstanding reversible capacity of 1015 mA h g −1 at 0.1 C after 50 cycles. Even at a high rate of 1 C, a stable capacity as high as 420 mA h g −1 could be maintained after 900 cycles, which suggested their great potential as efficient electrodes for high‐performance LIBs. Abstract : Under cover : Three‐dimensional, hierarchical, porous, zinc–nickel–cobalt oxide (ZNCO) microspheres constructed from porous ultrathin nanosheets encapsulated by graphene sheets (GNS) form a core/shell geometry in a facile and scalable process. The resultant ZNCO/GNS core/shell hybrids demonstrate remarkably enhanced electrochemical performances with outstanding capacity retention, high rate capability, and long‐term cycling stability.