Rational design of a nested pore structure sulfur host for fast Li/S batteries with a long cycle life. Issue 5 (13th January 2016)

• Record Type: Journal Article
• Authors: Wang, Meiri; Zhang, Hongzhang; Zhou, Wei; Yang, Xiaofei; Li, Xianfeng; Zhang, Huamin
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 5(2016)
• Page Start: 1653
• Page End: 1662
• Publication Date: 2016-01-13
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta08999a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Quad-modal nested pore structure carbon with ordered hierarchical pores for fast Li/S batteries with a long cycle life. Abstract : A nested pore structure carbon with spherical quad-modal pores was designed and used as a sulfur host material in Li/S batteries. The carbon pores were interconnected and there was an orderly distribution of 2.5, 15, 24 and 100 nm pores, giving a high pore volume of 4.15 cm 3 g −1 . The delicate nested pore structure allowed a uniform distribution of sulfur and rapid access of the electrolyte across the carbon, leading to an excellent C-rate performance and cycle stability. Even at 3C, the C/S composite containing 78 wt% S still delivered a maximum discharge capacity of 1228 mA h g −1 and maintained a reversible capacity of 914 mA h g −1 after 200 cycles.