Effect of Different Calcination Temperatures on the Structure and Properties of Zirconium-Based Coating Layer Modified Cathode Material Li1.2Mn0.54Ni0.13Co0.13O2

Liao, Zijun; Kang, Jiankai; Luo, Qi; Pan, Caifeng; Chen, Jiangdong; Mo, Xiaolong; Zou, Hanbo; Yang, Wei; Chen, Shengzhou

doi:10.1007/s40195-021-01345-8

Cited by 4 publications

(3 citation statements)

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“…Compared with the traditional LiFePO 4 and LiCoO 2 cathode materials, the unique nature of the Li-rich manganese oxide cathode material (LRMO) has attracted much attention owing to its high energy density (≈900 W h/kg), low cost, and good thermal stability . A clear consensus has been reached that the crystal structure of LRMO cathode material is composed of a rhomboid R 3̅ m LiMO 2 component and a monoclinic C 2/ m Li 2 MnO 3 component. − Nevertheless, LRMO material has several fatal problems such as large irreversible capacity, severe voltage decay, and an unstable structure. Many reports have focused on the causes of these problems, and the conclusions are transition metal (TM) elemental segregation, cationic redox coupling, − and the irreversible redox of oxygen ions .…”

Section: Introductionmentioning

confidence: 99%

“…A clear consensus has been reached that the crystal structure of LRMO cathode material is composed of a rhomboid R 3̅ m LiMO 2 component and a monoclinic C 2/ m Li 2 MnO 3 component. − Nevertheless, LRMO material has several fatal problems such as large irreversible capacity, severe voltage decay, and an unstable structure. Many reports have focused on the causes of these problems, and the conclusions are transition metal (TM) elemental segregation, cationic redox coupling, − and the irreversible redox of oxygen ions . During the first charge, some of the TM ions migrate to the octahedral position of the lithium layer with an increasing number of lithium ions extracted, which results in the accumulation of a spinel-like disordered phase.…”

Section: Introductionmentioning

confidence: 99%

“…Many reports have focused on the causes of these problems, and the conclusions are transition metal (TM) elemental segregation, 5 cationic redox coupling, 6−11 and the irreversible redox of oxygen ions. 4 During the first charge, some of the TM ions migrate to the octahedral position of the lithium layer with an increasing number of lithium ions extracted, which results in the accumulation of a spinel-like disordered phase. With the growth of the low-voltage spinel phase via the extension of the cycles, more TM ions are trapped in the Li layer, and the voltage attenuation is intensified.…”

Section: ■ Introductionmentioning

confidence: 99%

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Layered O6/O3 Multi-Phase Composite Derived from the P2/O3 Nanocrystalline Composite for High-Performance Li-Rich Manganese-Based Cathode Material

Yang

Chen

Liao

et al. 2022

ACS Appl. Energy Mater.

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As a result of the redox reaction of lattice oxygen occurring at 4.5 V, the Li-rich manganese cathode material with an O3 configuration has a theoretically high discharge capacity (>250 mA h/g). However, it also suffers a structural transition from layered structure to spinel structure in the cycling process, leading to severe voltage decay and capacity fading. On contrary, the O6 type material obtained via ion exchange of P2 type material can effectively inhibit the phase transition and stabilize the layered structure. Hence, in this work, we design an O6/O3 multi-phase composite material after ion exchange of the P2/O3 nanocrystalline composite. Compared with the O3 type cathode, the as-obtained cathode composite exhibits a higher initial discharge capacity (≈265 mA h/g at 20 mA/g) and an excellent capacity retention (≈87% after 100 cycles). Moreover, the first cycle Coulombic efficiency increases by nearly 10%, and voltage attenuation is effectively inhibited. Our findings demonstrate that modulating the O6/O3 configuration is a practical and simple methodology to promote the electrochemical performance of lithium-rich layered materials.

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