Sulfonated Lignin Binder Blocks Active Iodine Dissolution and Polyiodide Shuttle Toward Durable Zinc-Iodine Batteries

IF 24.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Zhixiang Chen, Jie Zhang, Chuancong Zhou, Shan Guo, Daoxiong Wu, Zaowen Zhao, Zhitong Wang, Jing Li, Zhenyue Xing, Peng Rao, Zhenye Kang, Xinlong Tian, Xiaodong Shi
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Abstract

The issues of active iodine dissolution and polyiodide shuttle severely hinder the development of zinc-iodine batteries (ZIBs). Binder engineering is considered a valid strategy to kill two birds with one stone. Herein, sodium lignosulfonate (LS), an important derivative of lignin, is optimized as a neotype binder for the fabrication of an iodine-loading cathode. Owing to the existence of the -SO3Na group, the electrostatic potential of LS molecule contains both negative and positive regions, which prefer to block the polyiodide shuttle behavior through the electrostatic repulsion effect, and adsorb the polyiodides through the electrostatic attraction effect, respectively. Meanwhile, LS molecule holds more negative Gibbs free energies for the consecutive radical reaction, and much stronger adsorption energies for iodine species, manifesting fast iodine conversion reaction kinetics, and effective inhibition for iodine dissolution behavior. As expected, the ZIBs based on LS binder delivers a high capacity of 153.6 mAh g−1 after 400 cycles at 0.1 A g−1, reversible capacity of 152.8 mAh g−1 after 500 cycles at 0.5 A g−1 (50 °C), and durable cycling stability for 12000 cycles at 5 A g−1, implying excellent iodine fixation ability of LS binder. This work guides the design of a special binder for iodine-based electrodes and facilitates the practical application of ZIBs.

Abstract Image

磺化木质素粘结剂阻止活性碘溶解和多碘化物向耐用锌-碘电池穿梭
活性碘溶解和多碘离子穿梭问题严重阻碍了锌碘电池的发展。粘结剂工程被认为是一种一石二鸟的有效策略。本文对木质素的重要衍生物木质素磺酸钠(LS)作为一种新型粘结剂进行了优化,用于制造负载碘的阴极。由于-SO3Na基团的存在,LS分子的静电电位包含了负极和正极两个区域,它们分别倾向于通过静电斥力作用阻断多碘离子的穿梭行为,并通过静电吸引作用吸附多碘离子。同时,LS分子对连续自由基反应具有更多的负吉布斯自由能,对碘的吸附能更强,表现出快速的碘转化反应动力学,有效抑制碘的溶解行为。正如预期的那样,基于LS粘合剂的ZIBs在0.1 a g−1下循环400次后具有153.6 mAh g−1的高容量,在0.5 a g−1(50°C)下循环500次后具有152.8 mAh g−1的可逆容量,在5 a g−1下循环12000次的持久稳定性,表明LS粘合剂具有良好的固碘能力。这项工作指导了碘基电极的特殊粘合剂的设计,并促进了ZIBs的实际应用。
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来源期刊
Advanced Energy Materials
Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
41.90
自引率
4.00%
发文量
889
审稿时长
1.4 months
期刊介绍: Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.
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