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Liang et al. Energy Mater 2023;3:300006 Energy Materials
DOI: 10.20517/energymater.2022.63

Article Open Access

C and ZIF-67 synergistically modified gelatin-based
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nanofibrous separators for Li-S batteries

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1,*
Xin Liang , Dongqing Zhao , Lulu Wang , Qianqian Huang , Chonghai Deng , Lili Wang , Lei Hu , Sheng
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Liang , Huaxia Deng , Hongfa Xiang 2,*
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School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, Anhui, China.
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School of Materials Science and Engineering, Engineering Research Center of High-Performance Copper Alloy Materials and
Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, Anhui, China.
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Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, Anhui, China.
* Correspondence to: Prof. Xin Liang, School of Energy Materials and Chemical Engineering, Hefei University, No.99 Jinxiu
Avenue, Hefei, Anhui, China. E-mail: x.liang@hfuu.edu.cn; Prof. Huaxia Deng, Department of Modern Mechanics, University of
Science and Technology of China, No.443 Huangshan Road, Hefei, Anhui, China. E-mail: hxdeng@ustc.edu.cn; Prof. Hongfa
Xiang, School of Materials Science and Engineering, Hefei University of Technology, No.193 Tunxi Road, Hefei, Anhui, China. E-
mail: hfxiang@hfut.edu.cn.
How to cite this article: Liang X, Zhao D, Wang L, Huang Q, Deng C, Wang L, Hu L, Liang S, Deng H, Xiang H. C and ZIF-67
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synergistically modified gelatin-based nanofibrous separators for Li-S batteries. Energy Mater 2023;3:300006.
https://dx.doi.org/10.20517/energymater.2022.63
Received: 19 Oct 2022 First Decision: 30 Nov 2022 Revised: 20 Dec 2022 Accepted: 9 Jan 2023 Published: 10 Feb 2023
Academic Editor: Yuping Wu Copy Editor: Ke-Cui Yang Production Editor: Ke-Cui Yang
Abstract
The lithium-sulfur (Li-S) battery has been attracting much more attention in recent years due to its high theoretical
capacity and low cost, although various issues, such as the “shuttle effect” and the low use ratio of active materials,
have been hindering the development and application of Li-S batteries. The separator is an important part of Li-S
batteries, and its modification is a simple and effective strategy to improve the electrochemical performance of Li-S
batteries. In this work, we explore separators with different functions on their two sides that have been produced
by a step-by-step electrospinning method. The multifunctional separator on one side is pure gelatin, and the other
side is zeolitic imidazolate framework-67 (ZIF-67)-C -gelatin. The ZIF-67-C -gelatin layer on the cathode side is
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of great importance. The chemisorption sites on it are provided by ZIF-67, and the transformation sites of lithium
polysulfide are provided by C . Gelatin, which is on the anode side, as an admirable separator material, makes the
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lithium flux uniform and thus prevents the generation of lithium dendrites. This type of multifunctional nanofiber
separator based on double gelatin layers plays an important role in the adsorption and conversion of polysulfides,
and it improves the overall performance of the Li-S battery. As a result, the Li-S batteries assembled with the
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prepared separator can still maintain the capacity of 888 mAh g after 100 cycles at 0.2 C, and the capacity

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