Journal Article

SiO2/N-doped graphene aerogel composite anode for lithium-ion batteries

Dong Xiaoyu, Deng Yichen, Hong, Haiping, Wang, Lingfeng, Zheng, Xing, Ju Zhicheng

2020

Overview

Three-dimensional SiO2/nitrogen-doped graphene aerogels (SiO2/NGA) with different SiO2 loading masses have been synthesized by a facile hydrothermal route. This composite structure significantly increased capacity through surface and interface engineering, and the three-dimensional structure can greatly absorb the volume expansion of silica. When applied as the anode material for lithium-ion batteries (LIBs), the SiO2/NGA nanocomposite can deliver a specific capacity of more than 1000 mAh g−1 at a current density of 100 mA g−1 with long cycle stability. Moreover, it can also present an excellent capacity reversibility after the rate performance test. Further analysis reveals that the SiO2/NGA shows an enhanced contribution of capacitive charge mechanism and displays typical pseudocapacitive behavior. In this case, constructing nitrogen-doped aerogel composite is an effective direction for improving Si-based electrodes for potential applications as the electrode for LIBs.Graphic abstractThree-dimensional porous SiO2/nitrogen-doped aerogel (SiO2/NGA) was synthesized. This novel SiO2/NGA composite structure can effectively solving the problem of huge volume change during cycles as well as facilitate the fast diffusion of Li ions and Electronics, and thus achieve improved anode performance. As Li-ion batteries anode materials, which shows excellent electrochemical performance

• Publisher: Springer Nature B.V
• Subject: Aerogels / Anodes / Composite structures / Diffusion rate / Electrochemical analysis / Electrode materials / Electrodes / Graphene / Lithium / Lithium-ion batteries / Materials science / Nanocomposites / Nitrogen / Performance tests / Rechargeable batteries / Silicon dioxide / Synthesis