用于室温下全固态钠离子电池的大分子木质素天然超离子聚合物电解质

IF 18.9 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Xuliang Lin , Ruitong Hong , Shaoping Su , Qifei Li , Liheng Chen , Xianhong Rui , Xueqing Qiu
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引用次数: 0

摘要

具有卓越安全性、机械强度和灵活性的固体聚合物电解质(SPE)对于推动下一代钠离子电池(SIB)的发展至关重要。传统的固态聚合物电解质通常具有温度敏感性,导致其在室温(RT)下的离子电导率相对较低。本文通过木质素和双(氟磺酰)亚胺钠(NaFSI)的溶解和解溶解来制造木质素基固相萃取剂(LG-SPE)。理论计算显示,木质素(含有丰富的官能团)和 FSI 分子通过减少立体阻碍和提供迁移位点来促进 Na 离子在电解质中的移动。因此,LG-SPE 在 RT 时的离子电导率提高到 3.4 × 10-4 S cm-1,Na 离子转移数高达 0.53。由 Na3V2(PO4)3/LG-SPE/NaTi2(PO4)3 组成的全固态 SIB 在 RT 下表现出优异的电化学性能,比容量达到 95 mA h g-1,在 0.1 C 下循环 200 次后容量保持率为 82%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Naturally superionic polymer electrolyte of macromolecular lignin for all-solid-state sodium-ion batteries at room temperature

Naturally superionic polymer electrolyte of macromolecular lignin for all-solid-state sodium-ion batteries at room temperature

Naturally superionic polymer electrolyte of macromolecular lignin for all-solid-state sodium-ion batteries at room temperature
Solid polymer electrolytes (SPEs) that offer superior safety, mechanical strength and flexibility are crucial for advancing next-generation sodium-ion batteries (SIBs). Conventional SPEs often display temperature sensitivity, leading to relatively low ionic conductivity at room temperature (RT). Herein, lignin-based SPEs (LG-SPEs) are created by solvation and desolvation of lignin and sodium bis(fluorosulfonyl)imide (NaFSI). Theoretical calculations reveal that lignin (containing rich functional groups) and FSI molecules facilitate the movement of Na-ions within the electrolyte by minimizing steric hindrance and offering migration sites. Consequently, LG-SPEs demonstrate an enhanced ionic conductivity of 3.4 × 10−4 S cm−1 at RT, with a Na-ion transfer number as high as 0.53. The assembled all-solid-state SIB comprising Na3V2(PO4)3/LG-SPE/NaTi2(PO4)3 exhibits excellent electrochemical performance at RT, achieving a specific capacity of 95 mA h g−1 and retaining 82 % of its capacity after 200 cycles at 0.1 C. This work presents an environmentally friendly and straightforward methodology for developing high-performance SPEs at RT, while also opening up new avenues for the valorization of lignin.
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来源期刊
Energy Storage Materials
Energy Storage Materials Materials Science-General Materials Science
CiteScore
33.00
自引率
5.90%
发文量
652
审稿时长
27 days
期刊介绍: Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.
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