DataVXACS Energy LettersPaper
journal article·2019-03-08

New Organic Complex for Lithium Layered Oxide Modification: Ultrathin Coating, High-Voltage, and Safety Performances

Yingqiang Wu, Hai Ming, Mengliu Li, Junli Zhang, Wandi Wahyudi, Leqiong Xie, Xiangming He, Jing Wang, Yuping Wu, Jun Ming

ACS Energy Letters· Volume 4· Issue 3
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Source abstract

Abstract

Surface modification of a cathode (e.g., lithium layered oxide, NCM) has become ever more important in lithium-ion batteries, particularly for pursuing higher energy densities and safety at high voltage. This is because structural degradation of the cathode can be mitigated significantly. Herein, an organic complex is introduced for metal phosphate (e.g., AlPO4) modification through a new film-forming process in nonaqueous solution. This general strategy overcomes the challenge of nonuniform coating in current precipitation methods and then opens a new avenue toward ultrathin surface modification on a molecular scale. As one example, as-prepared AlPO4-coated NCM exhibits much improved structural and electrochemical stability; meanwhile, thermal runaway can be suppressed significantly in overcharged cells using the modified NCM, demonstrating higher and reliable safety features. The great improvements benefit from the uniform and ultrathin AlPO4 coating, which inhibits the collapse and conversion of the layered structure to spinel, especially to the rock salt structure at high-voltage conditions, as confirmed by HRTEM and EELS.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

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

State Key Laboratory of Materials-Oriented Chemical Engineering & School of Energy Science and Engineering, Nanjing Tech University Nanjing 211816, People’s Republic of China

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China

Research Institute of Chemical Defense, Beijing 100191, People’s Republic of China

Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People’s Republic of China

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People’s Republic of China

Funding

Ministry of Science and Technology of the People's Republic of China · King Abdullah University of Science and Technology · Changchun Institute of Applied Chemistry · National Natural Science Foundation of China · State Key Laboratory of Rare Earth Resources Utilization

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