Structural insights into composition design of Li-rich layered cathode materials for high-energy rechargeable battery

Yin, Chong; Wei, Zhining; Zhang, Minghao; Qiu, Bao; Zhou, Yunjiao; Xiao, Yingchao; Zhou, Dong; Liang, Yun; Li, Cheng; Gu, Qiang; Wen, Wen; Xiao, Li; Wen, Xiaohui; Shi, Zhepu; He, Lunhua; Meng, Ying Shirley; Liu, Zhaoping

doi:10.1016/j.mattod.2021.10.020

Cited by 74 publications

(60 citation statements)

References 49 publications

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“…The thermal contribution to Debye‐Waller factors ( σ 2 ) has been reported as a practical measure of local bond strength. [ 22 ] As shown in Table S1 (Supporting Information), the σ 2 of CoO bonds for O3‐LCO and O2‐LCO are 0.32 and 0.28, respectively, demonstrating stronger Co─O bond strength of O2‐LCO than O3‐LCO. The stronger Co─O bond strength of O2‐LCO indicates increased energy barrier for Co migration, agreeing well with its improved structural stability in aqueous electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal contribution to Debye-Waller factors (𝜎 2 ) has been reported as a practical measure of local bond strength. [22] As shown in Table S1 Li site unfavorable because of the large electrostatic repulsion between face-shared cations. [6] But for O3-LCO, the edge-sharing configuration between LiO 6 and CoO 6 octahedra affords easier path for Co migration, thus favoring the layered-to-spinel phase transition.…”

Section: Origin Of Enhanced Structure Stability O2 Stackingmentioning

confidence: 99%

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Stabilizing Layered Structure in Aqueous Electrolyte via O2‐Type Oxygen Stacking

Wang

Liu

et al. 2022

Advanced Science

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Despite the high energy density of O3-type layered cathode materials, the short cycle life in aqueous electrolyte hinders their practical applications in aqueous lithium-ion batteries (ALIBs). In this work, it is demonstrated that the structural stability of layered LiCoO 2 in aqueous electrolyte can be remarkably improved by altering the oxygen stacking from O3 to O2. As compared to the O3-type LiCoO 2 , the O2-type LiCoO 2 exhibits significantly improved cycle performance in neutral aqueous electrolyte. It is found that the structural degradation caused by electrophilic attack of proton can be effectively mitigated in O2-type layered structure. With O2 stacking, CoO 6 octahedra in LiCoO 2 possess stronger Co-O bonds while Co migration from Co layer to Li layer is strongly hampered, resulting in enhanced structural stability against proton attack and prolonged cycle life in aqueous electrolyte. The findings in this work reveal that regulating oxygen stacking sequence is an effective strategy to improve the structural stability of layered materials for ALIBs.

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Section: Resultsmentioning

confidence: 99%

Section: Origin Of Enhanced Structure Stability O2 Stackingmentioning

confidence: 99%

Stabilizing Layered Structure in Aqueous Electrolyte via O2‐Type Oxygen Stacking

Wang

Liu

et al. 2022

Advanced Science

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“…209,210 Thus, criteria for simulation of EXAFS spectrum [210][211][212] can provide precise bond-length 160,161 and coordination number of shells. 213 Fig. 10 shows the results obtained from XAS study of 0.5Li 2 MnO 3 $0.5LiCoO 2 , Li[Ni 0.17 Li 0.2 Co 0.07 Mn 0.56 ]O 2 and NCM333 cathodes.…”

Section: Exafsmentioning

confidence: 99%

“…209,210 Thus, criteria for simulation of EXAFS spectrum 210–212 can provide precise bond-length 160,161 and coordination number of shells. 213…”

Section: Local Atomic Structure Investigationmentioning

confidence: 99%

Synchrotron radiation based X-ray techniques for analysis of cathodes in Li rechargeable batteries

et al. 2022

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“…Various strategies have been proposed to alleviate these problems, such as surface coating, ,− elements doping, − composition optimization, − and nanocrystallization . All of these strategies can improve the electrochemical performance of Li-rich layered materials to some extent.…”

Section: Introductionmentioning

confidence: 99%

Lithium-Rich Layered Oxide with a Porous Prism Architecture for High-Performance Cathode Materials of Lithium-Ion Batteries

Chen

Yan

Zhu

et al. 2022

ACS Appl. Energy Mater.

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Lithium-rich layered oxides are among the most promising cathode materials for high-energy-density lithium-ion batteries (LIBs). Besides the composition and structure, the morphology of Li-rich layered materials also has significant effects on their electrochemical performance. In this work, a porous prism architecture of Li1.2Mn0.54Ni0.13Co0.13O2 materials is constructed via a coprecipitation solvothermal method and subsequent heat treatment. Appropriate concentrations of transition metal ions and oxalic acid as the precipitant used in synthesis govern the growth of the porous prism structure. When employed as a cathode material for LIBs, the optimized material achieves a high initial discharge capacity of 295.3 mAh g–1 at 0.1C and excellent rate capability of 150.6 mAh g–1 even at 5.0C. These outstanding performances can be attributed to the synergistic effect of the porous morphology and one-dimensional prism architecture. In particular, the porous morphology promotes the intercalation and extraction of Li+ while the prism architecture is associated with the observed superior structural stability. This architecture opens a promising avenue for the development of high-performance cathode materials in LIBs.

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Structural insights into composition design of Li-rich layered cathode materials for high-energy rechargeable battery

Cited by 74 publications

References 49 publications

Stabilizing Layered Structure in Aqueous Electrolyte via O2‐Type Oxygen Stacking

Stabilizing Layered Structure in Aqueous Electrolyte via O2‐Type Oxygen Stacking

Synchrotron radiation based X-ray techniques for analysis of cathodes in Li rechargeable batteries

Lithium-Rich Layered Oxide with a Porous Prism Architecture for High-Performance Cathode Materials of Lithium-Ion Batteries

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