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From grass to battery anode: agricultural biomass hemp-derived carbon for lithium storage

机译：从草到电池阳极：锂储存的农业生物量大麻衍生碳

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摘要

Biomass-derived carbon, as a low-cost material source, is an attractive choice to prepare carbon materials, thus providing an alternative to by-product and waste management. Herein, we report the preparation of carbon from hemp stem as a biomass precursor through a simple, low-cost, and environment-friendly method with using steam as the activating agent. The hemp-derived carbon with a hierarchically porous structure and a partial graphitization in amorphous domains was developed, and for the first time, it was applied as an anode material for lithium-ion battery. Natural hemp itself delivers a reversible capacity of 190 mA h g(-1) at a rate of 300 mA g(-1) after 100 cycles. Ball-milling of hemp-derived carbon is further designed to control the physical properties, and consequently, the capacity of milled hemp increases to 300 mA h g(-1) along with excellent rate capability of 210 mA h g(-1) even at 1.5 A g(-1). The milled hemp with increased graphitization and well-developed meso-porosity is advantageous for lithium diffusion, thus enhancing electrochemical performance via both diffusion-controlled intercalation/deintercalation and surface-limited adsorption/desorption. This study not only demonstrates the application of hemp-derived carbon in energy storage devices, but also guides a desirable structural design for lithium storage and transport.
机译：生物质衍生的碳作为低成本的材料来源，是制备碳材料的有吸引力的选择，从而提供副产品和废物管理的替代品。在此，通过使用蒸汽作为活化剂，通过简单，低成本和环保方法报告从大麻茎作为生物质前体的碳的制备。开发了具有分层多孔结构的HEMP衍生的碳和在非晶结构域中的部分石墨化，并首次施加为锂离子电池的阳极材料。自然大麻本身以100次循环后的300mA G（-1）的速率可逆容量为190 ma H g（-1）。大麻衍生的碳的球磨进一步设计用于控制物理性质，因此，磨削的大麻的容量增加到300 mA Hg（-1），即使在1.5时也具有210 ma Hg（-1）的优异速率能力g（-1）。具有较高的石墨化和开发的中间孔隙率的研磨大麻是有利的，因此通过扩散控制的插层和脱嵌和表面有限的吸附/解吸来提高电化学性能。这项研究不仅证明了大麻衍生碳在能量存储装置中的应用，而且还指导了锂储存和运输的理想结构设计。

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  • 来源
    《RSC Advances》 |2018年第56期|共10页
  • 作者

    Um Ji Hyun; Ahn Chi-Yeong; Kim Jinsoo; Jeong Mihee; Sung Yung-Eun; Cho Yong-Hun; Kim Seung-Soo; Yoon Won-Sub;

  • 作者单位

    Sungkyunkwan Univ Dept Energy Sci Suwon 16419 South Korea;

    Seoul Natl Univ Sch Chem &

    Biol Engn Seoul 08826 South Korea;

    Kyung Hee Univ Dept Chem Engn Yongin 17104 South Korea;

    Sungkyunkwan Univ Dept Energy Sci Suwon 16419 South Korea;

    Seoul Natl Univ Sch Chem &

    Biol Engn Seoul 08826 South Korea;

    Kangwon Natl Univ Div Energy Engn Samcheok 25913 South Korea;

    Kangwon Natl Univ Dept Chem Engn Samcheok 25913 South Korea;

    Sungkyunkwan Univ Dept Energy Sci Suwon 16419 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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