Resolving the Compositional and Structural Defects of Degraded LiNixCoyMnzO2 Particles to Directly Regenerate High-Performance Lithium-Ion Battery Cathodes
By Yang Shi, Gen Chen, Fang Liu, X. Yue, Zheng Chen. ACS Energy Letters, 2018
382 citations recorded by the source corpus.
Layered oxide LiNixCoyMnzO2 (0 < x,y,z < 1, x + y + z = 1) or NCM is becoming the dominating cathode material in high-energy lithium-ion batteries (LIBs), which have degradation issues after cycling due to Li loss and phase changes. Directly resolving these issues to generate new cathodes cannot only reduce the high cost but also prevent environmental pollution from disposal of used LIBs. However, currently there is no effective approach to tackle this challenge. Here we demonstrate a nondestructive process to directly regenerate degraded NCM cathode particles to obtain new active particles. Using this method, nearly ideal stoichiometry, low cation mixing, and high phase purity were achieved in the regenerated NCM particles, which offer high specific capacity, good cycling stability, and high rate capability, all reaching pristine materials. Our work represents a simple yet efficient approach to directly regenerate high-performance NCM cathodes with distinct advantages over traditional hydrometallurgical ...
Subfields: Automotive Engineering, Electrical and Electronic Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/32443dad5a8f1639d0478881cf8ad4fb79c4eba0
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Citations in the corpus
- The 2021 battery technology roadmap (2020, background): “For example, closed-loop recycling and direct regeneration of cathode materials, were proposed based on the intrinsic properties and (electro)chemical degradation mechanism of the spent LIBs [163, 164].”
- Efficient Direct Recycling of Lithium-Ion Battery Cathodes by Targeted Healing (2020, methodology): “We first tested relithiation at 180 o C, which is the minimum temperature required for relithiation of degraded layered oxides, such as LiCoO2 and LiNi1-x-yCoxMnyO2 cathodes.(8,9,14) As shown in Figure 1B, the Li composition of the C-LFP particles increased from 0.”