Engineered Changes in Structure and Component from Solid NiS2/Reduced Graphene Oxide to Hollow Ni‐P/Reduced Graphene Oxide and the Enhanced Performance for Lithium‐Ion Batteries. Issue 9 (11th June 2019)

• Record Type: Journal Article
• Authors: Hu, Weiwei; Lyu, Chaojie; Gao, Changzhong; Wu, Kaili; Chen, Lihui; Zhu, Xixi
• Is Part Of: Energy technology. Volume 7:Issue 9(2019:Sep.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-06-11
• Subjects: graphene -- hollow structures -- lithium-ion batteries -- nanocomposites -- nickel phosphides; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201900342
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Using a phosphorization strategy combined with the annealing process, hollow Ni‐P octahedrons/reduced graphene oxide (H‐Ni‐P/rGO) nanocomposites are synthesized. As an anode material for lithium‐ion batteries (LIBs), the nanocomposite exhibits excellent electrochemical performance. The enhanced performance can be ascribed to the advantageous structural design of the composite. The electrochemical conductivity of the material is improved by introducing rGO into the composite. The contact area of the electrode/electrolyte is enlarged, the diffusion path of Li + /electrons is shortened, and the volume changes are remitted during the cycle process because of the Ni‐P hollow structure in the composite. As the anode of H‐Ni‐P/rGO nanocomposite for LIBs, the discharge capacity is 504.1 mAh g −1 after 100 cycles at a current density of 100 mA g −1 and the capacity is still 384.8 mAh g −1 even after 500 cycles at a current density of 1000 mA g −1 . Abstract : H‐Ni‐P/reduced graphene oxide (rGO) nanocomposites are successfully fabricated after hydrothermal treatment and phosphorization coupled with the annealing strategy. As an anode for lithium‐ion batteries (LIBs), the reversible capacities are 504.1 mAh g −1 at 100 mA g −1 after 100 cycles and 384.8 mAh g −1 at 1000 mA g −1 after 500 cycles, respectively.