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Heterogeneous Degradation
A top‐down heterogeneous degradation mechanism of industrial thick nickel‐rich layered cathodes during high‐temperature storage, including gas release, dissolution, and migration of Ni2+, are proposed by Kun Qian, Baohua Li, and co‐workers in article number 2102055. The degradation can be mitigated by regulating cationic disordering.
The thermal instability is a major problem in high‐energy nickel‐rich layered cathode materials for large‐scale battery application. Due to the scarce investigation of thick electrodes at the practical full‐cell level, the understanding of thermal failure mechanism is still insufficient. Herein, an intrinsic origin of thermal instability in fully charged industrial pouch cells during high‐temperature...
The 2D janus hybrid (gold NPs/graphene) superstructures were built via a rapid, solventless sputtering method in 10 seconds. The size and morphology of gold NPs can be fine controlled by adjusting the sputtering current and time. The resulting graphene hybrids also enjoyed tunable area density and desirable thermal stability.
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