High-voltage LiNi0.5Mn1.5O4 (LNMO) is one of the most promising cathode candidates for rechargeable lithium-ion batteries (LIBs) but suffers from deteriorated cycling stability due to severe interfacial side reactions and manganese dissolutions. Herein, a micro-nano porous spherical particle of LNMO cathode was designed for high-performance LIBs. The disordered structure and the preferred exposure of the facets can be controlled by the release of lattice oxygen in the high-temperature calcination process. The unique configuration of this material could enhance the structural stability, and play a crucial role in inhibiting manganese dissolution, promoting the rapid transport of Li+, as well as reducing the volume strain during the charge/discharge process. The designed cathode exhibits a remarkable discharge capacity of 136.7 mAh g−1 at 0.5 C, corresponding to an energy density of up to 636.4 Wh kg−1, unprecedented cycling stability (capacity retention after 500 cycles of 90.6%) and superior rate capability (78.9% of initial capacity at 10 C). The structurally controllable preparation strategy demonstrated in this work provides new insights into the structural design of cathode materials for LIBs.

This article is Open Access

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