Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li+/Ni2+ Antisite Defects for High-Rate Li-Ion Batteries

Li+/Ni2+ antisite defects mainly resulting from their similar ionic radii in the layered nickel-rich cathode materials belong to one of cation disordering scenarios. They are commonly considered harmful to the electrochemical properties, so a minimum degree of cation disordering is usually desired. However, this study indicates that LiNi0.8Co0.15Al0.05O2 as the key material for Tesla batteries possesses the highest rate capability when there is a minor degree (2.3%) of Li+/Ni2+ antisite defects existing in its layered structure. By combining a theoretical calculation, the improvement mechanism is attributed to two effects to decrease the activation barrier for lithium migration: (1) the anchoring of a low fraction of high-valence Ni2+ ions in the Li slab pushes uphill the nearest Li+ ions and (2) the same fraction of low-valence Li+ ions in the Ni slab weakens the repulsive interaction to the Li+ ions at the saddle point.

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Long cycle life, high rate capability of truncated octahedral LiMn2O4 cathode materials synthesized by a solid-state combustion reaction for lithium ion batteries

Ceramics International ◽

10.1016/j.ceramint.2014.05.130 ◽

2014 ◽

Vol 40 (9) ◽

pp. 14039-14043 ◽

Cited By ~ 30

Author(s):

Yanjun Cai ◽

Yudai Huang ◽

Xingchao Wang ◽

Dianzeng Jia ◽

Xincun Tang

Keyword(s):

Solid State ◽

Lithium Ion Batteries ◽

Cathode Materials ◽

Rate Capability ◽

Lithium Ion ◽

Combustion Reaction ◽

High Rate ◽

High Rate Capability ◽

Long Cycle Life ◽

Limn2o4 Cathode

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On the Latest Development of some Typical Cathode Materials for Lithium Ion Battery

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.783.137 ◽

2018 ◽

Vol 783 ◽

pp. 137-143

Author(s):

Yong Tao Zhang ◽

Xiao Li Hu

Keyword(s):

Thermal Stability ◽

Power Systems ◽

Cathode Material ◽

Lithium Ion Battery ◽

Cathode Materials ◽

Rate Capability ◽

Lithium Ion ◽

Modern Society ◽

High Rate ◽

Good Thermal Stability

The lithium-ion battery is widely and increasingly used in many portable electronic devices and high-power systems in the modern society. Currently, it is significant to develop excellent cathode materials to meet stringent standards for batteries. In this paper, recent developments were reviewed for several typical cathode materials with high voltages and good capacities. These cathode materials referred to LiCoO2, LiNiO2, LiMn2O4, LiMPO4 (M=Fe, Mn, Co and Ni, et al), and their composites. The technical bottlenecks about the cathode material is required to be conquered. For instance, LiCoO2 and LiNiO2 have high coulombic capacity and good cycling characteristics, but are costly and exhibit poor thermal stability. Simultaneously, LiMn2O4 exhibit good thermal stability, high voltage and high rate capability, but have low capacity. Thus it is advantageous to produce a composite which shares the benefits of both materials. The composite cathode material is superior over any single electrode material because the former has more balanced performance, and therefore, is promising to manufacture the next generation of batteries.

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LiV3O8 Nanoplates Via Polyacrylamide-assisted Freeze Drying Method and as Cathode Materials for Li-ion Batteries

E3S Web of Conferences ◽

10.1051/e3sconf/202129903008 ◽

2021 ◽

Vol 299 ◽

pp. 03008

Author(s):

Lin Li ◽

Wei Zheng ◽

Rongfei Zhao ◽

Jinsong Cheng

Keyword(s):

Discharge Capacity ◽

Cathode Materials ◽

Freeze Drying ◽

Rate Capability ◽

Lithium Ion ◽

Diffusion Path ◽

Reversible Capacity ◽

High Rate ◽

Profile Measurement ◽

Drying Method

The LiV3O8 nanoplates cathode materials was prepared by polyacrylamide-assisted freeze drying method. The annealing temperature affected the agrochemical properties of the LiV3O8 nanosheets cathode materials. The LiV3O8 nanoplates cathode materials were characterized by XRD, XPS, SEM, TEM, and galvanization charge/discharge profile measurement. The LiV3O8 fabricated at 550 °C (LVO550) showed the highest discharge capacity, best agrochemical performance, and high rate capability (after 100th, a reversible discharge capacity up to 223.8 mAh g−1). Benefiting from two dimensional nanoplates structure can provided a larger surface area, shorter lithium ion diffusion path, and maintain stable structure, the LiV3O8 nanoplates exhibited excellent rate capability, high reversible capacity and high temperature properties.

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LiNi0.90Co0.07Mg0.03O2 cathode materials with Mg-concentration gradient for rechargeable lithium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c9ta02803j ◽

2019 ◽

Vol 7 (36) ◽

pp. 20958-20964 ◽

Cited By ~ 8

Author(s):

Yudong Zhang ◽

Hang Li ◽

Junxiang Liu ◽

Jicheng Zhang ◽

Fangyi Cheng ◽

...

Keyword(s):

Cathode Material ◽

Lithium Ion Batteries ◽

Cathode Materials ◽

Concentration Gradient ◽

High Capacity ◽

Rate Capability ◽

Lithium Ion ◽

High Rate ◽

Gradient Structure ◽

High Rate Capability

Nickel-rich LiNi0.90Co0.07Mg0.03O2 cathode material with concentration gradient structure exhibits superior high capacity, high-rate capability and cycling stability.

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