Preparation and Evaluation of the Supercapacitive Performance of MnO2/3D-reduced Graphene Oxide Aerogel Composite Electrode Through In Situ Electrochemical Deposition

2021 ◽  
Author(s):  
Gu Liu ◽  
Yukun Zhang ◽  
Kejun Xu ◽  
Liuying Wang ◽  
Shanxin Xiong
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Deposition ◽  
Composite Electrode ◽  
Supercapacitive Performance ◽  
Reduced Graphene ◽  
Aerogel Composite ◽  
Reduced Graphene Oxide Aerogel ◽  
Graphene Oxide Aerogel ◽  
Preparation And Evaluation

scholarly journals Reduced graphene oxide aerogel with high-rate supercapacitive performance in aqueous electrolytes

2013 ◽  
Vol 8 (1) ◽  
pp. 247 ◽  
Author(s):  
Weijiang Si ◽  
Xiaozhong Wu ◽  
Jin Zhou ◽  
Feifei Guo ◽  
Shuping Zhuo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Rate ◽  
Aqueous Electrolytes ◽  
Supercapacitive Performance ◽  
Reduced Graphene ◽  
Reduced Graphene Oxide Aerogel ◽  
Graphene Oxide Aerogel

scholarly journals Stable metal anodes enabled by a labile organic molecule bonded to a reduced graphene oxide aerogel

2020 ◽  
Vol 117 (48) ◽  
pp. 30135-30141
Author(s):  
Yue Gao ◽  
Daiwei Wang ◽  
Yun Kyung Shin ◽  
Zhifei Yan ◽  
Zhuo Han ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Efficiency ◽  
High Current Density ◽  
Solid Electrolyte Interphase ◽  
Metal Deposition ◽  
Reduced Graphene ◽  
Lithium Deposition ◽  
Reduced Graphene Oxide Aerogel ◽  
Graphene Oxide Aerogel

Metallic anodes (lithium, sodium, and zinc) are attractive for rechargeable battery technologies but are plagued by an unfavorable metal–electrolyte interface that leads to nonuniform metal deposition and an unstable solid–electrolyte interphase (SEI). Here we report the use of electrochemically labile molecules to regulate the electrochemical interface and guide even lithium deposition and a stable SEI. The molecule, benzenesulfonyl fluoride, was bonded to the surface of a reduced graphene oxide aerogel. During metal deposition, this labile molecule not only generates a metal-coordinating benzenesulfonate anion that guides homogeneous metal deposition but also contributes lithium fluoride to the SEI to improve Li surface passivation. Consequently, high-efficiency lithium deposition with a low nucleation overpotential was achieved at a high current density of 6.0 mA cm−2. A Li|LiCoO2cell had a capacity retention of 85.3% after 400 cycles, and the cell also tolerated low-temperature (−10 °C) operation without additional capacity fading. This strategy was applied to sodium and zinc anodes as well.

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