无机材料学报 ›› 2023, Vol. 38 ›› Issue (11): 1316-1322.DOI: 10.15541/jim20230127

所属专题: 【能源环境】燃料电池(202312)

• 研究论文 • 上一篇    下一篇

高导电性生物质碳布的制备及其燃料电池气体扩散层性能

田煜彬1(), 田超凡1, 李森1, 赵永鑫1, 邢涛2, 李智2,3, 陈萧如1, 向帅蓉1, 代鹏程1()   

  1. 1.中国石油大学(华东) 新能源学院, 青岛266580
    2.山东能源集团有限公司新能源事业部, 济宁 273500
    3.西安交通大学 材料科学与工程学院, 西安 710049
  • 收稿日期:2023-03-13 修回日期:2023-05-28 出版日期:2023-06-16 网络出版日期:2023-06-16
  • 通讯作者: 代鹏程(1986-), 男, 副教授. E-mail: dpcapple@upc.edu.cn
  • 作者简介:田煜彬(1997-), 男, 硕士研究生. E-mail: yubinpeach@163.com
  • 基金资助:
    国家自然科学基金(51702365);山东省自然科学基金(ZR2022MB133)

Biomass-derived High-conductivity Carbon Cloth: Preparation and Application as Gas Diffusion Layers in Fuel Cells

TIAN Yubin1(), TIAN Chaofan1, LI Sen1, ZHAO Yongxin1, XING Tao2, LI Zhi2,3, CHEN Xiaoru1, XIANG Shuairong1, DAI Pengcheng1()   

  1. 1. College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
    2. New Energy Division, Shandong Energy Group Co., Ltd., Jining 273500, China
    3. School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2023-03-13 Revised:2023-05-28 Published:2023-06-16 Online:2023-06-16
  • Contact: DAI Pengcheng (1986-), male, associate professor. E-mail: dpcapple@upc.edu.cn
  • About author:TIAN Yubin (1997-), male, Master candidate. E-mail: yubinpeach@163.com
  • Supported by:
    National Natural Science Foundation of China(51702365);Natural Science Foundation of Shandong Province(ZR2022MB133)

摘要:

气体扩散层(GDL)是质子交换膜燃料电池(PEMFCs)的关键部件之一, 成本占燃料电池膜电极的40%~50%。开发低成本、高性能的GDL生产工艺, 可以降低燃料电池成本, 推动燃料电池商业化进程。本研究以纤维素棉布为原料, 通过铁基化合物的催化石墨化作用, 在较低温度(1500 ℃)下生成了一种高导电、高孔隙率的柔性生物质碳布。碳布由相互连接的微米级碳纤维组成, 形成了丰富的孔道, 其孔隙率为76.93%。经过铁基化合物催化, 碳纤维的表面原位生成了大量碳纳米管团簇, 增加了碳布的导电性, 使其平面电阻率降低至34 mΩ·cm, 垂直电阻率在 2 MPa压力下降低至2.8 mΩ·cm, 性能达到商业碳布的标准。生物质碳布作为气体扩散层的燃料电池在0.7 A·cm-2电流密度处功率密度达到0.4 W·cm-2, 超过了相同催化剂(Pt)负载量的商业碳布(0.34 W·cm-2)的电池功率密度。本研究制备的生物质碳布制备简单、价格低廉、性能优秀, 为开发低成本、高性能气体扩散层提供了新的思路。

关键词: 生物质, 碳布, 碳纳米管, 气体扩散层, 燃料电池

Abstract:

The gas diffusion layer (GDL) is a critical component of proton exchange membrane fuel cells (PEMFCs) and accounts for 40%-50% of the fuel cell membrane's cost. Developing a low-cost and high-performance GDL is imperative to advance the commercialization of PEMFCs. In this study, we generated a flexible carbon cloth with high electrical conductivity and porosity from cellulose cloth at a low temperature (1500 ℃). The carbon cloth is composed of micron-sized carbon fibers with a porosity of up to 76.93%. Through catalytic graphitization of iron-based compounds, massive carbon nanotube clusters were formed in situ on the surface of carbon fibers, which effectively enhanced the electrical conductivity of the carbon cloth. The in-plane resistance was as low as 34 mΩ·cm while the through-plane resistance was 2.8 mΩ·cm under a pressure of 2 MPa, meeting the performance standard of commercial carbon cloth. Furthermore, the PEMFC with the prepared carbon cloth as GDLs exhibits a power density of 0.4 W·cm-2 at current density of 0.7 A·cm-2, exceeding the device with commercial carbon cloth (0.34 W·cm-2 at 0.7 A·cm-2). This study demonstrates that the prepared biomass-derived carbon cloth with low-cost and high- performance holds great potential for advanced GDLs for PEMFCs.

Key words: biomass, carbon cloth, carbon nanotube, gas diffusion layer, fuel cell

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