DataVXACS Applied Energy MaterialsPaper
journal article·2022-12-26

3D Hierarchical Porous Carbon Aerogel Electrocatalysts Based on Cellulose/Aramid Nanofibers and Application in High-Performance Zn–Air Batteries

Qingqing Liu, Mengxia Shen, Chao Duan, Lilong Zhang, Jiahua Zhu, Yonghao Ni

ACS Applied Energy Materials· Volume 5· Issue 12
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Source abstract

Abstract

Three-dimensional (3D) carbon aerogels (CAs) are composed of interconnected networks and emerge as appealing platforms for the combination of heteroatom dopants, defective sites, and hierarchical porous structures. Here, we propose an effective and sustainable strategy to construct TOCNF/ANF-Cd hydrogels/aerogels using TEMPO-oxidized cellulose nanofibers (TOCNFs), thermally stabilized aramid nanofibers (ANFs), and low-boiling-point Cd2+. Hierarchical porous N-doped aerogel catalysts (N/CA-Cd) with TOCNF/ANF synergistic cross-linking were obtained by moderate temperature pyrolysis. Apart from serving as a source of N, ANF also improves carbon retention and graphitization, increasing the electrical conductivity of carbon aerogels. Due to the spatially continuous structure and multiscale porous structure and abundant N dopants and edges/defects, the as-obtained N/CA0.5-Cd carbonaceous catalysts manifest an impressive electrocatalytic efficacy with a positive half-wave potential (0.86 V). In particular, the Zn–air batteries assembled with N/CA0.5-Cd as the air cathode catalyst have an excellent peak power density of 186 mW cm–2 and a splendid specific capacity of 730 mA h g–1.
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Research context

Energy storagePolymersNanomaterialsCatalysis & surfaces

OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Bioresources Chemical and Materials Engineering, Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi’an710021, China

State Key Laboratory of Material-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing211816, China

Department of Chemical Engineering, University of New Brunswick, Fredericton, New BrunswickE3B 5A3, Canada

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shaanxi Province · Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Shaanxi University of Science and Technology, Ministry of Education · Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology · State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University

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