journal article·2024-10-02

Promoting Cathodic Kinetics and Anodic Stability in Practical Room-Temperature Sodium–Sulfur Batteries with Bifunctional Electrolytes

Can Qian, Zhicheng Wang, Jingjing Xu, Daosong Fu, Fan Zhang, Ao Li, Yujia Zhang, Zhixiong Li, Hong Li, Xiaodong Wu

ACS Applied Materials & Interfaces· Volume 16· Issue 39
Publisher page

Abstract

The development of room-temperature (RT) sodium–sulfur (Na–S) batteries is severely hindered due to the slow kinetics of the S cathode and the instability of the Na-metal anode. To overcome this, we introduced a dual-functional electrolyte cosolvent, trifluoromethanesulfonamide (TFMSA). Short-chain Na 2 S x (1 ≤ x ≤ 2) can be effectively dissolved due to the strong H–S bond interaction between TFMSA and sulfides, which changes the S conversion process, thereby effectively enhancing the conversion kinetics of the cathode. Meanwhile, TFMSA can generate a stable solid electrolyte interphase on the Na-metal surface to protect it from soluble polysulfide attack. Therefore, the RT Na–S batteries using the ether electrolyte show a high initial discharge capacity of 896.6 mAh g –1 and a capacity retention rate of 73% after 150 cycles at 0.2C, and the pouch cell also demonstrates its practical performance. This work proposes a dual-functional electrolyte cosolvent selection principle to inspire the practical application of high-performance RT Na–S batteries.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Thermal Expansion and Ionic Conductivity · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd., Liyang 213300, China

Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

College of Material Science and Engineering, Hohai University, Changzhou 213022, China

i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China

School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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