Nanoscale Surface Modification of Lithium‐Rich Layered‐Oxide Composite Cathodes for Suppressing Voltage Fade

Zheng, Fenghua; Yang, Chenghao; Xiong, Xunhui; Xiong, Jiawen; Hu, Renzong; Chen, Yu; Liu, Meilin

doi:10.1002/anie.201506408

Cited by 326 publications

(145 citation statements)

References 32 publications

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“…[87][88][89] Most coatings generally take the form of monovalent oxides, such as Al 2 92 An interesting coating with promising results came from utilizing a thin film of the olivine cathode material, LiFePO 4 . 93 Another coating with interesting results comes from AlF 3 , also explored by our group. 37,94,95 AlF 3 was coated on Li-rich material via pH controlled aqueous solution, and annealed at 400…”

Section: Stabilization Of Voltage and Capacity Fadementioning

confidence: 98%

Review—Recent Advances and Remaining Challenges for Lithium Ion Battery Cathodes

Erickson

Schipper

Penki

et al. 2017

J. Electrochem. Soc.

153

103

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Electrodes prepared from lithium-rich (Li-rich) xLi 2 MnO 3 ·(1-x)LiNi a Co b Mn c O 2 materials (a + b + c = 1) show extremely high discharge capacities, arising from excess Li + present in their Li 2 MnO 3 component, and the ability to reversibly store charge with O 2− anions. These electrodes suffer serious voltage and capacity fading however, due to the migration of transition metals to the Li-layer at advanced states of charging, partial structural layered-to-spinel transformation and other reasons. In this focus paper, the current understanding of the above materials is summarized, briefly concluding with attempts by our groups to mitigate the voltage and capacity fade of these electrodes.

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Section: Stabilization Of Voltage and Capacity Fadementioning

confidence: 98%

Review—Recent Advances and Remaining Challenges for Lithium Ion Battery Cathodes

Erickson

Schipper

Penki

et al. 2017

J. Electrochem. Soc.

153

103

View full text Add to dashboard Cite

show abstract

“…Rechargeable lithium-ion batteries (LIBs) are one of the most important energy storage devices in microchips, cell phones, electric vehicles (EVs), and hybrid electric vehicles (HEVs) (Whittingham, 2004; Armand and Tarascon, 2008; Zheng et al, 2015; Ou et al, 2017; Pan et al, 2017a,b; Yang et al, 2017). Layer-structured LiCoO 2 has been extensively studied and largely used as commercial cathode materials due to their high working potential, high energy density and good cycling performance.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Single Crystalline Fork-Like K2V8O21 as High-Performance Cathode Materials for Lithium-Ion Batteries

Hao

Zhu

et al. 2018

Front. Chem.

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Single crystalline fork-like potassium vanadate (K2V8O21) has been successfully prepared by electrospinning method with a subsequent annealing process. The as-obtained K2V8O21 forks show a unique layer-by-layer stacked structure. When used as cathode materials for lithium-ion batteries, the as-prepared fork-like materials exhibit high specific discharge capacity and excellent cyclic stability. High specific discharge capacities of 200.2 and 131.5 mA h g−1 can be delivered at the current densities of 50 and 500 mA g−1, respectively. Furthermore, the K2V8O21 electrode exhibits excellent long-term cycling stability which maintains a capacity of 108.3 mA h g−1 after 300 cycles at 500 mA g−1 with a fading rate of only 0.043% per cycle. The results demonstrate their potential applications in next-generation high-performance lithium-ion batteries.

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“…1a)814151617, driving a phase transition of the overall crystal framework to spinel and/or rocksalt structures. This spontaneous phase transition continues with cycling and causes a drop in the operation voltage and specific capacity181920, which undermines the original advantage of the Li-rich layered phase.…”

mentioning

confidence: 99%

A stable lithium-rich surface structure for lithium-rich layered cathode materials

et al. 2016

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Lithium ion batteries are encountering ever-growing demand for further increases in energy density. Li-rich layered oxides are considered a feasible solution to meet this demand because their specific capacities often surpass 200 mAh g−1 due to the additional lithium occupation in the transition metal layers. However, this lithium arrangement, in turn, triggers cation mixing with the transition metals, causing phase transitions during cycling and loss of reversible capacity. Here we report a Li-rich layered surface bearing a consistent framework with the host, in which nickel is regularly arranged between the transition metal layers. This surface structure mitigates unwanted phase transitions, improving the cycling stability. This surface modification enables a reversible capacity of 218.3 mAh g−1 at 1C (250 mA g−1) with improved cycle retention (94.1% after 100 cycles). The present surface design can be applied to various battery electrodes that suffer from structural degradations propagating from the surface.

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Nanoscale Surface Modification of Lithium‐Rich Layered‐Oxide Composite Cathodes for Suppressing Voltage Fade

Cited by 326 publications

References 32 publications

Review—Recent Advances and Remaining Challenges for Lithium Ion Battery Cathodes

Review—Recent Advances and Remaining Challenges for Lithium Ion Battery Cathodes

Electrospun Single Crystalline Fork-Like K2V8O21 as High-Performance Cathode Materials for Lithium-Ion Batteries

A stable lithium-rich surface structure for lithium-rich layered cathode materials

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