Fluorinating All Interfaces Enables Super‐Stable Solid‐State Lithium Batteries by In Situ Conversion of Detrimental Surface Li2CO3
Source abstract
Abstract
Abstract Li‐stuffed battery materials intrinsically have surface impurities, typically Li2CO3, which introduce severe kinetic barriers and electrochemical decay for a cycling battery. For energy‐dense solid‐state lithium batteries (SSLBs), mitigating detrimental Li2CO3 from both cathode and electrolyte materials is required, while the direct removal approaches hardly avoid Li2CO3 regeneration. Here, a decarbonization–fluorination strategy to construct ultrastable LiF‐rich interphases throughout the SSLBs by in situ reacting Li2CO3 with LiPF6 at 60 °C is reported. The fluorination of all interfaces effectively suppresses parasitic reactions while substantially reducing the interface resistance, producing a dendrite‐free Li anode with an impressive cycling stability of up to 7000 h. Particularly, transition metal dissolution associated with gas evolution in the cathodes is remarkably reduced, leading to notable improvements in battery rate capability and cyclability at a high voltage of 4.5 V. This all‐in‐one approach propels the development of SSLBs by overcoming the limitations associated with surface impurities and interfacial challenges.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 China
National Industry‐Education Integration Platform of Energy Storage Tianjin University Tianjin 300072 China
Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China
Shenzhen Geim Graphene Center Institute of Materials Research (IMR) Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China
Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Fuzhou 350207 China
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
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