Electrolytes Polymerization‐Induced Cathode‐Electrolyte‐Interphase for High Voltage Lithium‐Ion Batteries
Source abstract
Abstract
Abstract Lithium‐ion batteries (LIBs) based on LiNixCoyMn1‐x‐yO2 (NCM) cathode materials have been widely commercialized, because of their high energy density, favorable rate performance, and relatively low cost. However, with increased Ni content to further increase their energy density, their cycling stability deteriorates dramatically and thus fails to meet the commercial application requirements. The artificial cathode‐electrolyte‐interphase (CEI) is a promising approach to solve this problem. Here, a robust CEI is fabricated through in situ polymerization of ethylene carbonate induced by aluminum isopropoxide (AIP). By adding 1 wt.% AIP in a commercial electrolyte, the capacity retention of LiNi0.8Co0.1Mn0.1O2||Li cell at 1 C rate has been significantly increased from 80.8% to 97.8% with a highly reversible capacity of 176 mA h g−1 after 200 cycles. AIP can be also used as an additive during the slurry‐making process, enabling a reversible capacity of 170 mA h g−1 for LiCoO2 after 200 cycles even at a high charge cut‐off voltage of 4.6 V. It is confirmed that the in situ formed CEI layer can prevent the cathodes from cracking and reduce the irreversible phase transformation.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
Centre for Nanoscale Materials Argonne National Laboratory Lemont IL 60439 USA
Materials Characterization and Preparation Facility The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong P. R. China
Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USA
Materials Science and Nano‐Engineering Department Mohammed VI Polytechnic University Ben Guerir 434150 Morocco
Chemistry Department Faculty of Science University of Jeddah Jeddah 21589 Saudi Arabia
Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
Funding
Innovation and Technology Commission · U.S. Department of Energy · Office of Science · Basic Energy Sciences
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