Novel hierarchical porous carbon prepared by a one-step template route for electric double layer capacitors and Li–Se battery devices. Issue 8 (10th February 2020)

• Record Type: Journal Article
• Authors: Lei, Youyi; Liang, Xinmiao; Yang, Li; Jiang, Ping; Lei, Zhenyu; Wu, Shuaishuai; Feng, Jiwen
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 8(2020)
• Page Start: 4376
• Page End: 4385
• Publication Date: 2020-02-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta13753j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Low-cost hierarchical porous carbon materials with a controllable structure for supercapacitors and lithium selenium batteries. Abstract : Low-cost hierarchical porous carbon materials with a controllable structure and high specific surface area as well as large pore volume were synthesized by a one-step route involving SnO2 @chitosan precursor carbonization and subsequent SnO2 template removal. We found that when HPC CISC-29 is applied as the electrode in the supercapacitor device, it exhibits both high specific capacity (260.4 F g −1 ) and excellent rate capacitance retention (81.9%) from 0.1 A g −1 to 10 A g −1 . CISC-29 shows superiority compared to conventional activated carbons for which specific capacitance and capacitance retention are 100–200 F g −1 and 60–70%, respectively. Solid-state NMR and NLDFT porosity distribution results reveal that the high specific capacitance is most likely associated with the optimized hierarchical porous structure, e.g. rich small-size micropores and their good connection with large-size mesopores. Finally, CISC-29 was complexed with Se to construct a cathode for lithium selenium batteries. Se@CISC-29 shows excellent performance with a specific capacity of 1207.0 mA h g −1 at 0.1 A g −1 .