1.2Ni 0.13Co 0.13Mn 0.54O 2 layered oxide with exposed {010} planes as a high-performance cathode for lithium-ion batteries]]>

摘要

AbstractThe layered lithium-rich cathode material Li1.2Ni0.13Co0.13Mn0.54O2crystallizes with an α-NaFeO2structure, through which Li+ions are transported along two-dimensional channels. In this work, nanoplates of Li1.2Ni0.13Co0.13Mn0.54O2(NP-LNCMO) with exposed {010} planes are successfully synthesized. The formation of open structures provides unimpeded paths for Li+ion intercalation/deintercalation. The synthesis involves the use of ethylene glycol with two hydroxyl groups as the solvent, which can also react with the transition metal ions to yield plate-like structures with exposed {010} planes. NP-LNCMO displays a high specific discharge capacity of 288.9?mAh g?1at 0.1?C (1?C?=?300?mA?g?1) and an excellent rate capability (a discharge capacity of 109.7?mAh g?1at 15?C). Furthermore, negligible voltage decay occurs during 50 charge/discharge cycles. The excellent electrochemical performance of NP-LNCMO can be attributed to the formation of nanoplates with exposed electrochemically active {010} planes.Highlights?Nanoplates of Li1.2Ni0.13Co0.13Mn0.54O2are synthesized using a polyol solvent.?The nanoplates are composed of {010} lateral and {001} frontal planes.?The {010} planes exposed can supply more active charge transfer reaction sites.?The nanoplates display high discharge capacity and excellent rate capability.]]>