DataVXACS Energy LettersPaper
journal article·2022-04-08

Anion–Diluent Pairing for Stable High-Energy Li Metal Batteries

Chunnan Zhu, Chuangchao Sun, Ruhong Li, Suting Weng, Liwu Fan, Xuefeng Wang, Lixin Chen, Malachi Noked, Xiulin Fan

ACS Energy Letters· Volume 7· Issue 4
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Source abstract

Abstract

Rechargeable Li metal batteries (LMBs) have attracted wide attention as promising candidates for the next generation of energy-storage systems. However, limited Coulombic efficiency and unregulated dendrite growth restrict its application. Here, we report a kind of electrolyte by introducing fluorinated aromatic diluents into high-concentration electrolytes (HCEs). Unlike other localized HCEs, the fluorinated aromatic diluents pairing with anions promote the formation of a homogeneous and robust solid–electrolyte interphase (SEI), which endows Li metal with an ultrahigh Coulombic efficiency of ∼99.8%. The Li||LiNi0.8Co0.1Mn0.1O2 battery holds a capacity retention of >80% over 260 cycles even with a thin Li anode (20 μm) and a high cathode loading (3.5 mAh cm–2). A 1.8 Ah Li||NMC811 pouch cell with a lean electrolyte delivers an energy density of 340 Wh kg–1 and a stable cycling life over 200 cycles. The designed electrolytes, which benefit from the synergetic effects of anions and diluents on the SEI, pave the way for the next-generation LMBs.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

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

Affiliations

State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

Institute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China

Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Hangzhou 310013, People’s Republic of China

Department of Chemistry, Bar-Ilan University, Ramat Gan 529002, Israel

Funding

Natural Science Foundation of Zhejiang Province · the Fundamental Research Funds for the Zhejiang Provincial Universities · ?Hundred Talents Program? of Zhejiang University · the Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China

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