A robust carbon coating strategy toward Ni-rich lithium cathodes

Chen, Gang; Bi-you, Peng; Han, Rui; Chen, Nanxi; Wang, Zhongzui; Wang, Qian

doi:10.1016/j.ceramint.2020.05.160

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…Over the last few years, numerous research studies have been targeting the development of Ni-rich cathodes (usually NMC with Ni ratio of 6 or above) to incorporate them in so-called next-generation LIBs [ 5 , 8 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ] for commercial EVs. Most of the experimental and numerical work cited deal with the adversities of high Ni content, namely, chemical and structural instability, both leading to capacity fading, poor rate performance, and potential decay [ 59 ].…”

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

“…Most solutions proposed for improving the electrochemical performance of Ni-rich cathodes involve either doping the electrode, surface coating, controlling particle size, crystalline structure, porosity, and/or film thickness [ 5 , 6 , 53 , 54 , 55 , 56 , 59 , 60 , 70 , 71 ].…”

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

“…On the other hand, carbon coating leads to significant improvements in ionic and electron conductivity, besides also improving structural stability. Chen et al [ 54 ] synthesized carbon-coated NMC811 cathodes using PVDF as a binder and tested several samples with different wt% in PVDF at 0.2C. Both initial discharge capacity (∼190–195 mAh·g

) and Coulombic efficiency were essentially unaffected by carbon content, while the capacity decay after 100 cycles improved from 6.85% to 1.26% for 2.5% PVDF content.…”

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

“…Integration in the original manufacturing process and single-step coating are ideal solutions. For instance, G. Chen et al [ 54 ] opted for PVDF/NMP as a binder for carbon-coated NMC cathodes due to its usage in electrode manufacturing at the industrial level. The previous examples show how a cost-effective design of coating and doping may be achieved in next-generation LIBs with Ni-rich cathodes.…”

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

“…( Bottom right ) Impedance of NMC cathodes coated with different percentages of carbon. Reproduced with permission [ 54 ]. ( b ) Charge/discharge curves for 1 wt% BT@NMC electrodes at 0.1C, Nyquist plots for pristine and 1 wt% BT@NMC after ( center ) first cycle and ( right ) after 100 cycles.…”

Section: Figurementioning

confidence: 99%

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The Latest Trends in Electric Vehicles Batteries

et al. 2021

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Global energy demand is rapidly increasing due to population and economic growth, especially in large emerging countries, which will account for 90% of energy demand growth to 2035. Electric vehicles (EVs) play a paramount role in the electrification revolution towards the reduction of the carbon footprint. Here, we review all the major trends in Li-ion batteries technologies used in EVs. We conclude that only five types of cathodes are used and that most of the EV companies use Nickel Manganese Cobalt oxide (NMC). Most of the Li-ion batteries anodes are graphite-based. Positive and negative electrodes are reviewed in detail as well as future trends such as the effort to reduce the Cobalt content. The electrolyte is a liquid/gel flammable solvent usually containing a LiFeP6 salt. The electrolyte makes the battery and battery pack unsafe, which drives the research and development to replace the flammable liquid by a solid electrolyte.

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Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

) and Coulombic efficiency were essentially unaffected by carbon content, while the capacity decay after 100 cycles improved from 6.85% to 1.26% for 2.5% PVDF content.…”

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

Section: The Positive Electrode (Cathode)mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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The Latest Trends in Electric Vehicles Batteries

et al. 2021

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Facile Magnetite Coating for Stable High‐Voltage Cycling of Nickel‐Rich Cathodes in Conventional Liquid and All‐Solid‐State Lithium‐Ion Batteries

Mahajani,

Bhimani,

Lakhnot

et al. 2024

Small

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The instability of Nickel (Ni)‐rich cathodes at high voltage is a critical bottleneck toward developing superior lithium‐ion batteries. This instability is driven by cathode‐electrolyte side reactions, causing rapid degradation, and compromising the overall cycle life. In this study, a protective coating using dispersed “magnetite (FeO.Fe2O3)” nanoparticles is used to uniformly decorate the surface of LiNi0.8Co0.1Mn0.1O2 (NMC 811) microparticles. The modified cathode delivers significant improvement in electrochemical performance at high voltage (≈4.6 V) by suppressing deleterious electrode–electrolyte interactions. A notably higher cycle stability, rate performance, and overall energy density is realized for the coated cathode in a conventional liquid electrolyte battery. When deployed in pellet‐stacked solid‐state cells with Li6PS5Cl as the electrolyte, the magnetite‐coated NMC 811 showed strikingly superior cycling stability than its uncoated counterpart, proving the versatility of the chemistry. The facile surfactant‐assisted coating process developed in this work, in conjunction with the affordability, abundance, and nontoxic nature of magnetite makes this a promising approach to realize commercially viable high voltage Ni‐rich cathodes that exhibit stable performance in liquid as well as solid‐state lithium‐ion batteries.

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Lithium‐Ion Conductive Coatings for Nickel‐Rich Cathodes for Lithium‐Ion Batteries

Shao,

Xu,

Amardeep

et al. 2024

Small Methods

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Nickel (Ni)‐rich cathodes are among the most promising cathode materials of lithium batteries, ascribed to their high‐power density, cost‐effectiveness, and eco‐friendliness, having extensive applications from portable electronics to electric vehicles and national grids. They can boost the wide implementation of renewable energies and thereby contribute to carbon neutrality and achieving sustainable prosperity in the modern society. Nevertheless, these cathodes suffer from significant technical challenges, leading to poor cycling performance and safety risks. The underlying mechanisms are residual lithium compounds, uncontrolled lithium/nickel cation mixing, severe interface reactions, irreversible phase transition, anisotropic internal stress, and microcracking. Notably, they have become more serious with increasing Ni content and have been impeding the widespread commercial applications of Ni‐rich cathodes. Various strategies have been developed to tackle these issues, such as elemental doping, adding electrolyte additives, and surface coating. Surface coating has been a facile and effective route and has been investigated widely among them. Of numerous surface coating materials, have recently emerged as highly attractive options due to their high lithium‐ion conductivity. In this review, a thorough and comprehensive review of lithium‐ion conductive coatings (LCCs) are made, aimed at probing their underlying mechanisms for improved cell performance and stimulating new research efforts.

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A robust carbon coating strategy toward Ni-rich lithium cathodes

Cited by 22 publications

References 29 publications

The Latest Trends in Electric Vehicles Batteries

The Latest Trends in Electric Vehicles Batteries

Facile Magnetite Coating for Stable High‐Voltage Cycling of Nickel‐Rich Cathodes in Conventional Liquid and All‐Solid‐State Lithium‐Ion Batteries

Lithium‐Ion Conductive Coatings for Nickel‐Rich Cathodes for Lithium‐Ion Batteries

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