Fast Heat Transport Inside Lithium-Sulfur Batteries Promotes Their Safety and Electrochemical Performance.
Fast Heat Transport Inside Lithium-Sulfur Batteries Promotes Their Safety and Electrochemical Performance.
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锂硫电池内部的快速热传输可提高其安全性和电化学性能
DOI：
10.1016/j.isci.2020.101576
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发表时间：
2020-10-23
期刊：
影响因子：
5.8
通讯作者：
Zhu M
中科院分区：
文献类型：
--
作者：
Xu G;Yu D;Zheng D;Wang S;Xue W;Cao XE;Zeng H;Xiao X;Ge M;Lee WK;Zhu M
锂硫电池因其高比容量和能量密度而备受关注。然而，由于多硫化物的溶解导致电化学性能不佳，阻碍了其实际应用。可溶性多硫化物的浓度与内部产热呈线性关系。锂硫电池内部的热传递问题常常被忽视。在此，我们设计了一种功能性隔膜，它不仅具有0.65瓦每米开尔文的高导热率，还能缓解溶解的活性物质向锂负极的扩散，从而提高电化学性能和安全性。使用这种功能性隔膜的锂硫电池在0.2C倍率下比容量为1126.4毫安时每克，100次循环后比容量仍可保持在893.5毫安时每克。在贫电解液条件下（电解液/硫（E/S）=3微升每毫克），高硫负载的软包电池也表现出良好的电化学性能。
通过一种简单的方法设计了锂硫电池内部的快速热传递
软包电池在贫电解液条件下表现出良好的电化学性能
进行了原位二维X射线吸收近边结构（XANES）分析以探究锂硫电池的机理
电化学储能；储能；能源材料
Lithium-sulfur batteries are paid much attention owing to their high specific capacity and energy density. However, their practical applications are impeded by poor electrochemical performance due to the dissolved polysulfides. The concentration of soluble polysulfides has a linear relationship with the internal heat generation. The issue of heat transport inside lithium-sulfur batteries is often overlooked. Here, we designed a functional separator that not only had a high thermal conductivity of 0.65 W m−1 K−1 but also alleviated the diffusion of dissolved active materials to the lithium anode, improving the electrochemical performance and safety issue. Lithium-sulfur batteries with the functional separator have a specific capacity of 1,126.4 mAh g−1 at 0.2 C, and the specific capacity can be remained up to 893.5 mAh g−1 after 100 cycles. Pouch Cells with high sulfur loading also showed a good electrochemical performance under a lean electrolyte condition of electrolyte/sulfur (E/S) = 3 μL mg−1. Fast heat transport inside Li-S batteries was designed by a simple method Pouch cells showed a good electrochemical performance under a lean electrolyte condition In situ 2D XANES was conducted to explore the mechanism of Li-S batteries Electrochemical Energy Storage; Energy Storage; Energy Materials
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影响因子：
4.6
作者：
Chen Z;Wang J;Chao D;Baikie T;Bai L;Chen S;Zhao Y;Sum TC;Lin J;Shen Z
通讯作者：
Shen Z
影响因子：
16.6
作者：
Wood, Kevin N.;Steirer, K. Xerxes;Teeter, Glenn
通讯作者：
Teeter, Glenn
影响因子：
17.6
作者：
Yang, Yuan;Huang, Xiaopeng;Chen, Gang
通讯作者：
Chen, Gang
影响因子：
2.5
作者：
Ge, Mingyuan;Lee, Wah-Keat
通讯作者：
Lee, Wah-Keat
影响因子：
56.7
作者：
Xue, Weijiang;Shi, Zhe;Li, Ju
通讯作者：
Li, Ju