DataVXACS Energy LettersPaper
journal article·2023-07-14

A Nonflammable Electrolyte for High-Voltage Lithium Metal Batteries

Guangzhao Zhang, Jiawei Li, Qingrong Wang, Hui Wang, Jun Wang, Kai Yu, Jian Chang, Chaoyang Wang, Xiang Hong, Qiang Ma, Yonghong Deng

ACS Energy Letters· Volume 8· Issue 7
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Source abstract

Abstract

The electrochemical instability of the polar solvents in electrolytes often causes reduction/oxidation at the surface of both Li anodes and nickel-rich cathodes in high-voltage lithium metal batteries (LMBs). Here, we design a bipolar molecule-regulated electrolyte with a capsule-like solvation structure and nonflammability to stabilize high-voltage LMBs. The key enabler is to design and synthesize a nonflammable bipolar molecule with a ion-dissociative polar head and a perfluorinated nonpolar tail. The bipolar solvent promotes the formation of capsule-like solvation sheaths via weak coordination and encapsulates the polar molecules inside the primary solvation shell, drastically reducing the detrimental decomposition of solvents. Finally, the assembled high-voltage cell provides high capacity retention (Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2: >90%) during 200 charge/discharge cycles under strict conditions. The capsule-like electrolyte also enables a 420 mAh pouch cell with a cell-level energy density of 440 Wh kg –1 along with long cycling stability over 150 cycles (retention: 92%).
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Polyoxometalates: Synthesis and Applications

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

Affiliations

Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China

Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, People’s Republic of China

Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, People’s Republic of China

Watt Lab, Central Research Institute, Huawei Technologies Co., Ltd., Bantian Longgang District, Shenzhen 518129, People’s Republic of hina

Funding

Science and Technology Planning Project of Guangdong Province · Special Project for Research and Development in Key areas of Guangdong Province · Science and Technology Foundation of Shenzhen City · Basic and Applied Basic Research Foundation of Guangdong Province · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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