Designing In-Situ-Formed Interphases Enables Highly Reversible Cobalt-Free LiNiO2 Cathode for Li-ion and Li-metal Batteries

Deng, Tao; Fan, Xiulin; Cao, Longsheng; Chen, Ji; Hou, Singyuk; Ji, Xiao; Chen, Long; Li, Shuang; Zhou, Xiuquan; Hu, Enyuan; Su, Dong; Yang, Xiao‐Qing; Wang, Chunsheng

doi:10.1016/j.joule.2019.08.004

Cited by 196 publications

(166 citation statements)

References 48 publications

(69 reference statements)

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“…Rechargeable lithium-ion batteries (LIBs) are becoming promising energy storage devices for electric vehicles (EVs) due to their high energy density and long life characteristics 1 – 4 . However, traditional cathode materials, such as layered LiCoO 2 , LiNi x Co y Mn 1- x - y O 2 , and Olivine-type LiFePO 4 , exhibit insufficient discharge-specific capacities (<180 mAh g −1 ) and do not meet the requirements for EVs 5 – 8 . Hence, the development of new cathode materials with higher energy densities is crucial.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of transition metals dissolution in cobalt-free cathode with ultrathin robust interphase in concentrated electrolyte

et al. 2020

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The low Coulombic efficiency during cycling hinders the application of Cobalt-free lithiumrich materials in lithium-ion batteries. Here we demonstrated that the dissolution of iron, rather than traditionally acknowledged manganese, is mainly responsible for the low Coulombic efficiency of the iron-substituted cobalt-free lithium-rich material. Besides, we presented an approach to inhibit the dissolution of transition metal ions by using concentrated electrolytes. We found that the cathode electrolyte interphase (CEI) layer formed in the concentrated electrolyte is a uniform and robust LiF-rich CEI, which is a sharp contrast with the uneven and fragile organic-rich CEI formed in the dilute electrolyte. The LiF-rich CEI not only effectively inhibits the dissolution of TMs but also stabilizes the cathode structure. The Coulombic efficiency, cycling stability, rate performance, and safety of the Fe-substituted cobalt-free lithium-rich cathode material in the concentrated electrolyte have been improved tremendously.

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Section: Introductionmentioning

confidence: 99%

Inhibition of transition metals dissolution in cobalt-free cathode with ultrathin robust interphase in concentrated electrolyte

et al. 2020

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“…1b). 5,12,[38][39][40][41] As the frontier energy level of Ni e g -O 2p antibonding bands is higher (i.e. higher m e À) than that of Co t 2g nonbonding bands, the reaction voltage of LiNiO 2 (3.8 (Fig.…”

Section: Origins Of Large Capacity/high Voltagementioning

confidence: 99%

Designing positive electrodes with high energy density for lithium-ion batteries

Okubo

Dwibedi

et al. 2021

J. Mater. Chem. A

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“…One of the most promising studies recently was presented by Deng et al. who designed a modified F- B-rich SEI on LiNiO 2 with the addition of a small amount of difluoro (oxalato) borate (LiDFOB) in the electrolyte ( Deng et al., 2019 ). The SEI formed as a robust and compact layer that mitigated the dissolution of Ni as well as the irreversible transformation to the unwanted NiO rock salt phase by protecting the surface from reacting with the by-products generated from the oxidation of electrolyte at high voltage.…”

Section: Cobalt-free Layered Cathodesmentioning

confidence: 99%

Breaking Free from Cobalt Reliance in Lithium-Ion Batteries

Gourley

Chen

2020

iScience

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Summary The exponential growth in demand for electric vehicles (EVs) necessitates increasing supplies of low-cost and high-performance lithium-ion batteries (LIBs). Naturally, the ramp-up in LIB production raises concerns over raw material availability, where constraints can generate severe price spikes and bring the momentum and optimism of the EV market to a halt. Particularly, the reliance of cobalt in the cathode is concerning owing to its high cost, scarcity, and centralized and volatile supply chain structure. However, compositions suitable for EV applications that demonstrate high energy density and lifetime are all reliant on cobalt to some degree. In this work, we assess the necessity and feasibility of developing and commercializing cobalt-free cathode materials for LIBs. Promising cobalt-free compositions and critical areas of research are highlighted, which provide new insight into the role and contribution of cobalt.

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Designing In-Situ-Formed Interphases Enables Highly Reversible Cobalt-Free LiNiO2 Cathode for Li-ion and Li-metal Batteries

Cited by 196 publications

References 48 publications

Inhibition of transition metals dissolution in cobalt-free cathode with ultrathin robust interphase in concentrated electrolyte

Inhibition of transition metals dissolution in cobalt-free cathode with ultrathin robust interphase in concentrated electrolyte

Designing positive electrodes with high energy density for lithium-ion batteries

Breaking Free from Cobalt Reliance in Lithium-Ion Batteries

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