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Wang C, Zhong WH. Promising Sustainable Technology for Energy Storage Devices: Natural Protein-derived Active Materials. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Chen H, Lu X, Zhang L, Sui D, Wang C, Meng F, Qi W. Enhanced electrochemical performance of MnO 2 nanoparticles: graphene aerogels as conductive substrates and capacitance contributors. Dalton Trans 2021; 50:8776-8784. [PMID: 34085673 DOI: 10.1039/d1dt00404b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An N-doped graphene aerogel (NGA) is used as a reactive container for growing MnO2 nanoparticles via a soaking-hydrothermal strategy. MnO2 nanoparticles pile up on the surface of reduced graphene oxide sheets with crosslinked structures serving as electrical conductors. Importantly, the NGA generates extra capacitance during the electrochemical process, which accomplishes a satisfactory compensation in the physical-chemical properties of MnO2. As a cathodic electrode for Zn-ion batteries, the MnO2/NGA exhibits a specific capacity of 275.8 mA h g-1 and pre-eminent cycling stability with a retention of 93.6% at 3 A g-1 after 1000 cycles. Meanwhile, the proposed electrode also shows a relatively high specific capacitance of 341 F g-1 for a supercapacitor in 1 M Na2SO4. Meanwhile, the long-term cycling stability shows only a slight decrease by 5.1% of the initial capacitance after 5000 continuous cycles at 3 A g-1, which indicates its superior electrochemical stability. Additionally, the assembled asymmetric supercapacitor also shows good electrochemical performance. This work highlights the extensive function of an N-doped graphene aerogel as a promising substrate for enhancing the electrochemical performance of MnO2, which opens the gate for wide potential applications of graphene aerogel composites emphasizing their complementary effects.
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Affiliation(s)
- Huaxia Chen
- Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China
| | - Xingyu Lu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Lili Zhang
- Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China and Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Dianpeng Sui
- Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China
| | - Chao Wang
- School of Medical Devices, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Fanbao Meng
- Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China
| | - Wei Qi
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
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