Process optimization for producing hierarchical porous bamboo-derived carbon materials with ultrahigh specific surface area for lithium-sulfur batteries

JOURNAL OF ALLOYS AND COMPOUNDS

卷:738

Article

Yan, Yinglin¹  Shi, Mangmang¹  Wei, Yiqi¹  Zhao, Chao²  Carnie, Matt²  Yang, Rong¹  Xu, Yunhua¹ 

[1] Xian Univ Technol, Inst Chem Power Sources, Sch Mat Sci & Engn, 5 South Jinhua Rd, Xian 710048, Shaanxi, Peoples R China

[2] Swansea Univ, Coll Engn, Mat Res Ctr, Bay Campus,Fabian Way, Swansea SA1 8EN, W Glam, Wales

关键词: Lithium-sulfur batteries;    Bamboo strip;    Biomass;    High specific surface area;   

DOI  :  10.1016/j.jallcom.2017.11.212

来源: Elsevier

【 摘 要 】

Bamboo derived porous carbon materials, as inexpensive and environmentally friendly, microporous material sources, have been attracting enthusiastic attention for energy storage applications. In this work three different processes were employed to prepare three types of bamboo derived porous carbon materials. Among them, the sample prepared via a one-step activation method delivered the largest total pore volume (1.146 cm(3) g(-1)) and the largest specific surface area (1824.4 m(2) g(-1)) owning to a hierarchical porous structure. After the sample was used to encapsulate sulfur (S) to prepare carbon/S composite as cathodes for Li-S batteries. The composite loaded with 58.5 wt% S exhibited a high initial capacity of 1453 mAh g(-1) at a rate of 0.1 C (1 C = 1675 mA g(-1)). A reversible capacity of 255 mAh g(-1) was maintained after 500 cycles at 1 C with a capacity decay rate of only 0.0016% per cycle. This suggests that the bamboo derived porous carbon could be a promising conductive carbon matrix for carbon/S composite cathodes in Li-S batteries. (c) 2017 Elsevier B.V. All rights reserved.

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