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Intragranular cracking within the material structure of Ni‐rich (LiNixCoyMn1‐x‐y, x ≥0.9) cathodes greatly threatens cathode integrity and causes capacity degradation, yet its atomic‐scale incubation mechanism is not completely elucidated. Notably, the physicochemical properties of component elements fundamentally determine the material structure of cathodes. Herein, a diffusion‐controlled incubation...
The energy density of lithium‐sulfurized polyacrylonitrile (Li‐SPAN) batteries has chronically suffered from low sulfur content. Although a free‐standing electrode can significantly reduce noncapacity mass contribution, the slow bulk reaction kinetics still constrain the electrochemical performance. In this regard, a novel electrochemically active additive, polypyrrole (PPy), is introduced to construct...
Herein, the electrochemical properties and reaction mechanism of Li3‒2xCaxV2(PO4)3/C (x = 0, 0.5, 1, and 1.5) as negative electrode materials for sodium‐ion/potassium‐ion batteries (SIBs/PIBs) are investigated. All samples undergo a mixed contribution of diffusion‐controlled and pseudocapacitive‐type processes in SIBs and PIBs via Trasatti Differentiation Method, while the latter increases with Ca...
Lithium‐ and manganese‐rich layered oxides (LMLOs, ≥ 250 mAh g−1) with polycrystalline morphology always suffer from severe voltage decay upon cycling because of the anisotropic lattice strain and oxygen release induced chemo‐mechanical breakdown. Herein, a Co‐free single‐crystalline LMLO, that is, Li[Li0.2Ni0.2Mn0.6]O2 (LLNMO‐SC), is prepared via a Li+/Na+ ion‐exchange reaction. In situ synchrotron‐based...
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