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- Title
Sandwich‐Like Nanosheets of a N‐Doped Porous Carbon/Graphene Composite with Enhanced Electrochemical Properties for Lithium and Sodium Storage.
- Authors
Qin, Weiwei; Teng, Yongqiang; Zhang, Junke; Xiao, Xinfeng; Li, Yuan; Li, Zhenyu
- Abstract
Abstract: Energy storage systems, including lithium‐/sodium‐ion batteries (LIBs/SIBs), are important for being able to use renewable energies efficiently. The anode material is a vital link in the great industrialization chain. Herein, a sandwich‐like N‐doped porous carbon/graphene (N‐HCG) composite has been successfully achieved by using a facile and low‐temperature liquid‐phase method with melamine as the nitrogen source, followed by a carbonization process. The composite possesses a high specific surface area of 282.4 m2 g−1. As an anode in lithium‐ion batteries, N‐HCG delivers a capacity of 643 mAh g−1 at 100 mA g−1, and a high capacity of 406 mAh g−1 is maintained even at 5 A g−1 after 2700 cycles. For sodium‐ion batteries, the obtained capacities of the N‐HCG electrodes are 208 mAh g−1 (100 mA g−1 for 120 cycles) and 145 mAh g−1 (1000 mA g−1 for 700 cycles). The excellent electrochemical performance including the rate capability and lifespan of N‐HCG can be attributed to the synergistic effects of the 2D sandwich‐like nanosheets with pores and extrinsic nitrogen doping. Thus, the as‐prepared N‐HCG composite is a highly promising anode material for LIB/SIB applications.
- Subjects
ELECTRIC properties of graphene; MELAMINE; CARBONIZATION; ELECTROCHEMICAL analysis; ELECTRIC properties of nanostructured materials
- Publication
ChemElectroChem, 2018, Vol 5, Issue 4, p694
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201701214