期刊
SCIENCE
卷 370, 期 6522, 页码 1313-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abc3167
关键词
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资金
- Office of Vehicle Technologies of the U.S. Department of Energy (DOE) through the Applied Battery Research Program [DE-LC-000L053]
- Vehicle Technology office of the DOE through the Advanced Battery Materials Research program [DE-SC0012704]
- National Science Foundation [DMR-1832808]
- DOE Office of Science [DE-SC0013004, DE-AC05-76RL01830]
High-energy nickel (Ni)-rich cathode will play a key role in advanced lithium (Li)-ion batteries, but it suffers from moisture sensitivity, side reactions, and gas generation. Single-crystalline Ni-rich cathode has a great potential to address the challenges present in its polycrystalline counterpart by reducing phase boundaries and materials surfaces. However, synthesis of high-performance single-crystalline Ni-rich cathode is very challenging, notwithstanding a fundamental linkage between overpotential, microstructure, and electrochemical behaviors in single-crystalline Ni-rich cathodes. We observe reversible planar gliding and microcracking along the (003) plane in a single-crystalline Ni-rich cathode. The reversible formation of microstructure defects is correlated with the localized stresses induced by a concentration gradient of U atoms in the lattice, providing clues to mitigate particle fracture from synthesis modifications.
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