当前位置：
X-MOL 学术
›
Small Methods
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries via a Multifunctional Conductive Binder
Small Methods ( IF 10.7 ) Pub Date : 2021-09-09 , DOI: 10.1002/smtd.202100839 Shiming Chen 1 , Zhibo Song 1 , Yuchen Ji 1 , Kai Yang 2 , Jianjun Fang 1 , Lu Wang 1 , Zijian Wang 1 , Yan Zhao 1 , Yunlong Zhao 2 , Luyi Yang 1 , Feng Pan 1
Small Methods ( IF 10.7 ) Pub Date : 2021-09-09 , DOI: 10.1002/smtd.202100839 Shiming Chen 1 , Zhibo Song 1 , Yuchen Ji 1 , Kai Yang 2 , Jianjun Fang 1 , Lu Wang 1 , Zijian Wang 1 , Yan Zhao 1 , Yunlong Zhao 2 , Luyi Yang 1 , Feng Pan 1
Affiliation
|
Exhibiting high specific energy and low cost, lithium–sulfur batteries are considered promising candidates for the next-generation battery. However, its wide applications are limited by the insulating nature of the sulfur, dissolution of polysulfide species, and large volume change of the sulfur cathode. In this work, a conductive binder, crosslinked polyfluorene (C-PF) is synthesized and employed in Li–S batteries to enhance the overall electrochemical performance from the following three aspects: 1) possessing high electronic conductivity, C-PF facilitates lowered areal resistance for the sulfur electrode and leads to an improved rate capability; 2) owing to the cross-linked polymer structure, favorable mechanical properties of the electrode can be achieved, hence the well-preserved electrode integrity; 3) forming strong binding with various polysulfide species, C-PF manages to trap them from diffusing to the Li anode, which greatly improves the cycling stability of Li–S cells. Through designing a multifunctional binder to comprehensively enhance the Li–S cathode, this proposed approach could be broadly applied to fully harness the energy from S redox in addition to cathode material modifications.
中文翻译：
通过多功能导电粘合剂抑制锂硫电池中的多硫化物穿梭
锂硫电池表现出高比能量和低成本，被认为是下一代电池的有希望的候选者。然而，其广泛应用受到硫的绝缘性、多硫化物物种的溶解以及硫正极体积变化大的限制。在这项工作中，导电粘合剂，交联聚芴（C-PF）被合成并用于 Li-S 电池，以从以下三个方面提高整体电化学性能：1）具有高电子电导率，C-PF 有助于降低面电阻用于硫电极并提高倍率性能；2）由于聚合物的交联结构，可以获得良好的电极机械性能，从而保持电极完整性；3) 与各种多硫化物形成强结合，C-PF 设法阻止它们扩散到锂负极，这大大提高了锂硫电池的循环稳定性。通过设计一种多功能粘合剂来全面增强 Li-S 正极，除了正极材料改性外，该方法还可以广泛应用于充分利用 S 氧化还原的能量。
更新日期：2021-10-28
中文翻译：
通过多功能导电粘合剂抑制锂硫电池中的多硫化物穿梭
锂硫电池表现出高比能量和低成本，被认为是下一代电池的有希望的候选者。然而，其广泛应用受到硫的绝缘性、多硫化物物种的溶解以及硫正极体积变化大的限制。在这项工作中，导电粘合剂，交联聚芴（C-PF）被合成并用于 Li-S 电池，以从以下三个方面提高整体电化学性能：1）具有高电子电导率，C-PF 有助于降低面电阻用于硫电极并提高倍率性能；2）由于聚合物的交联结构，可以获得良好的电极机械性能，从而保持电极完整性；3) 与各种多硫化物形成强结合，C-PF 设法阻止它们扩散到锂负极，这大大提高了锂硫电池的循环稳定性。通过设计一种多功能粘合剂来全面增强 Li-S 正极，除了正极材料改性外，该方法还可以广泛应用于充分利用 S 氧化还原的能量。
京公网安备 11010802027423号