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Preparation and Properties of PAN/Lyocell Composite Carbon Fiber Paper for Fuel Cell
Received:February 26, 2023  
DOI：10.11980/j.issn.0254-508X.2023.05.017
Key Words:Lyocell fiber  carbon fiber paper  tensile strength  air permeability  resistivity
Fund Project:制浆造纸科学与技术教育部重点实验室开放基金（KF201910）；国家级大学生创新创业训练计划资助项目（202110057285）；生物源纤维制造技术国家重点实验室开放基金资助课题（SKL202201）。
Author NameAffiliationPostcode
GUO Yu* Tianjin Key Lab of Pulp & Paper/State Key Lab of Biobased Fiber Manufacturing Technology， Tianjin University of Science and Technology， Tianjin， 300457 300457
CHEN Xiushuang Tianjin Key Lab of Pulp & Paper/State Key Lab of Biobased Fiber Manufacturing Technology， Tianjin University of Science and Technology， Tianjin， 300457 300457
YANG Shuo Tianjin Key Lab of Pulp & Paper/State Key Lab of Biobased Fiber Manufacturing Technology， Tianjin University of Science and Technology， Tianjin， 300457
Key Lab of Pulp and Paper Science & Technology of Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 		250353
CHENG Bowen Tianjin Key Lab of Pulp & Paper/State Key Lab of Biobased Fiber Manufacturing Technology， Tianjin University of Science and Technology， Tianjin， 300457 300457
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Abstract:In this study， Lyocell fiber （as reinforcing fiber） and chopped PAN carbon fiber （as main fiber） were used to prepare composite carbon fiber paper （referred to as carbon fiber paper） for fuel cell gas diffusion layer. The influences of refining strength on the pulp and fiber properties of Lyocell fiber were investigated， and the effects of Lyocell fiber addition on the dispersion of carbon fiber， and strength， permeability and conductivity of carbon fiber paper were clarified. The results showed that the addition of Lyocell fiber effectively improved the dispersion performance of carbon fiber， the uniformity index and the strength performance of carbon fiber paper precursor （CPP） and carbon fiber paper， and air permeability and electrical conductivity of carbon fiber paper. When the mass ratio of carbon fiber to Lyocell fiber was 7∶3， the carbon fiber paper had the best performances， with tensile strength of 14.3 MPa， bending strength of 5.9 MPa， air permeability of 248 mm/s， and planar resistivity of 5.48 mΩ·cm.
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