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室温钠硫电池多硫化钠防御体系的设计与构建

Design and Construction of Sodium Polysulfides Defense System for Room-Temperature Na-S Battery.

作者信息

Yang Tingting, Guo Bingshu, Du Wenyan, Aslam Muhammad Kashif, Tao Mengli, Zhong Wei, Chen Yuming, Bao Shu-Juan, Zhang Xuan, Xu Maowen

机构信息

Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of Education School of Materials and Energy Southwest University Chongqing 400715 P. R. China.

Department of Nuclear Science and Engineering Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA.

出版信息

Adv Sci (Weinh). 2019 Sep 30;6(23):1901557. doi: 10.1002/advs.201901557. eCollection 2019 Dec.

DOI:10.1002/advs.201901557
PMID:31832316
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6891912/
Abstract

Room-temperature Na-S batteries are facing one of the most serious challenges of charge/discharge with long cycling stability due to the severe shuttle effect and volume expansion. Herein, a sodium polysulfides defense system is presented by designing and constructing the cathode-separator double barriers. In this strategy, the hollow carbon spheres are decorated with MoS (HCS/MoS) as the S carrier (S@HCS/MoS). Meanwhile, the HCS/MoS composite is uniformly coated on the surface of the glass fiber as the separator. During the discharge process, the MoS can adsorb soluble polysulfides (NaPSs) intermediates and the hollow carbon spheres can improve the conductivity of S as well as act as the reservoir for electrolyte and NaPSs, inhibiting them from entering the anode to make Na deteriorate. As a result, the cathode-separator group applied to room-temperature Na-S battery can enable a capacity of ≈1309 mAh g at 0.1 C and long cycling life up to 1000 cycles at 1 C. This study provides a novel and effective way to develop durable room-temperature Na-S batteries.

摘要

由于严重的穿梭效应和体积膨胀，室温钠硫电池在长循环稳定性的充放电方面面临着最严峻的挑战之一。在此，通过设计和构建阴极-隔膜双屏障，提出了一种多硫化钠防御系统。在该策略中，中空碳球用MoS修饰（HCS/MoS）作为硫载体（S@HCS/MoS）。同时，HCS/MoS复合材料均匀地涂覆在玻璃纤维表面作为隔膜。在放电过程中，MoS可以吸附可溶性多硫化物（NaPSs）中间体，中空碳球可以提高硫的导电性，并作为电解质和NaPSs的储存库，抑制它们进入阳极导致钠变质。结果，应用于室温钠硫电池的阴极-隔膜组在0.1 C时可实现约1309 mAh g的容量，在1 C时可实现长达1000次循环的长循环寿命。这项研究为开发耐用的室温钠硫电池提供了一种新颖有效的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/b6e12a62fa8d/ADVS-6-1901557-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/8b0835c4506e/ADVS-6-1901557-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/9c10eea43ab1/ADVS-6-1901557-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/9e298c08a421/ADVS-6-1901557-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/2b4cb8573764/ADVS-6-1901557-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/071db65dce65/ADVS-6-1901557-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/b6e12a62fa8d/ADVS-6-1901557-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/8b0835c4506e/ADVS-6-1901557-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/9c10eea43ab1/ADVS-6-1901557-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/9e298c08a421/ADVS-6-1901557-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/2b4cb8573764/ADVS-6-1901557-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/071db65dce65/ADVS-6-1901557-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f99c/6891912/b6e12a62fa8d/ADVS-6-1901557-g006.jpg

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Atomic cobalt as an efficient electrocatalyst in sulfur cathodes for superior room-temperature sodium-sulfur batteries.原子钴在室温钠-硫电池硫正极中的高效电催化剂。
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Simultaneous Suppression of the Dendrite Formation and Shuttle Effect in a Lithium-Sulfur Battery by Bilateral Solid Electrolyte Interface.
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