Journal
ACS Applied Materials & Interfaces
Volume 8, Issue 29, Pages 18860-18866Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b04774
Keywords
sodium-ion batteries; anode materials; graphene oxide; expended interlayer; boron; boric acid
Funding
- NSFC [51471089]
- MOE [IRT13R30]
- 111 Project [B12015]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Reduced graphene oxide, an intensively investigated material for Li-ion batteries, has shown mostly unsatisfactory performance in Na-ion batteries, since its d-spacing is believed to be too small for effective insertion/deinsertion of Na+ ions. Herein, a facile method was developed to produce boron-functionalized reduced graphene oxide (BF-rGO), with an enlarged interlayer spacing and defect-rich structure, which effectively accommodates the sodiation/desodiation and provides more active sites. The Na/BF-rGO half cells exhibit unprecedented long cycling stability, with similar to 89.4% capacity retained after 5000 cycles (0.002% capacity decay per cycle) at 1000 mA.g(-1) current density. High specific capacity (280 mAh.g(-1)) and great rate capability were also delivered in the Na/BF-rGO half cells.
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