Journal ArticleDOI
Reversible anionic redox chemistry in high-capacity layered-oxide electrodes
Mariyappan Sathiya,Gwenaëlle Rousse,Kannadka Ramesha,C.P. Laisa,Hervé Vezin,Moulay Tahar Sougrati,Moulay Tahar Sougrati,Marie-Liesse Doublet,Dominique Foix,Danielle Gonbeau,Danielle Gonbeau,Wesley Walker,Annigere S. Prakash,M. Ben Hassine,M. Ben Hassine,Loic Dupont,Loic Dupont,Jean-Marie Tarascon,Jean-Marie Tarascon +18 more
TLDR
In this article, the reactivity of a class of high-capacity oxides with a single redox cation has been investigated and it has been shown that these oxides exhibit sustainable reversible capacities as high as 230 mAh/g−1 and good cycling behavior with no signs of voltage decay.Abstract:
Li-ion batteries have contributed to the commercial success of portable electronics and may soon dominate the electric transportation market provided that major scientific advances including new materials and concepts are developed. Classical positive electrodes for Li-ion technology operate mainly through an insertion-deinsertion redox process involving cationic species. However, this mechanism is insufficient to account for the high capacities exhibited by the new generation of Li-rich (Li1+xNiyCozMn(1−x−y−z)O2) layered oxides that present unusual Li reactivity. In an attempt to overcome both the inherent composition and the structural complexity of this class of oxides, we have designed structurally related Li2Ru1−ySnyO3 materials that have a single redox cation and exhibit sustainable reversible capacities as high as 230 mA h g−1. Moreover, they present good cycling behaviour with no signs of voltage decay and a small irreversible capacity. We also unambiguously show, on the basis of an arsenal of characterization techniques, that the reactivity of these high-capacity materials towards Li entails cumulative cationic (Mn+→M(n+1)+) and anionic (O2−→O22−) reversible redox processes, owing to the d-sp hybridization associated with a reductive coupling mechanism. Because Li2MO3 is a large family of compounds, this study opens the door to the exploration of a vast number of high-capacity materials.read more
Citations
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Journal ArticleDOI
Improved performance of Co-doped Li2O cathodes for lithium-peroxide batteries using LiCoO2 as a dopant source
Hiroaki Kobayashi,Mitsuhiro Hibino,Yoshiyuki Ogasawara,Kazuya Yamaguchi,Tetsuichi Kudo,Shin Ichi Okuoka,Koji Yonehara,Hironobu Ono,Yasutaka Sumida,Masaharu Oshima,Noritaka Mizuno +10 more
TL;DR: Li et al. as discussed by the authors proposed a new battery system based on the redox of lithium peroxide (Li 2 O 2 )/lithium oxide ( Li 2 O) at the cathode.
Journal ArticleDOI
Understanding capacity fading mechanism of thick electrodes for lithium-ion rechargeable batteries
Kyu-Young Park,Ji-Won Park,Won Mo Seong,Kyungho Yoon,Taehyun Hwang,Kun-Hee Ko,Ju-Hyeong Han,Yang Jaedong,Kisuk Kang +8 more
TL;DR: In this article, the degradation behavior of the LiNi0·6Co0·2Mn0· 2O2, one of widely adopted cathodes, is comparatively investigated under high loading levels as high as 28mg cm−2 over the extended cycling.
Journal ArticleDOI
Role of Ordered Ni Atoms in Li Layers for Li-Rich Layered Cathode Materials
TL;DR: In this article, the effects of the ordered Ni on Li battery performance are presented, based on first-principles calculations and experimental observations, and the Ni substitution suppresses the oxygen loss by moderating the oxidation of oxygen ions during delithiation process and forms bonds with adjacent oxygen after the first deintercalation of Li ions.
Journal ArticleDOI
Reviving reversible anion redox in 3d-transition-metal Li rich oxides by introducing surface defects
Yi Pei,Yi Pei,Qing Chen,Qing Chen,Meiyu Wang,Bin Li,Peng Wang,Graeme Henkelman,Liang Zhen,Guozhong Cao,Cheng-Yan Xu +10 more
TL;DR: In this article, a highly defective surface layer with oxygen vacancies is achieved, substantially enhancing the reversibility of anion redox as well as the stability of bulk crystal structure, and the modified LLO expresses a high performances of discharge capacity (94.5%), redox potential (>3.0 V during discharge) and energy density (90.2%) after 100 cycles.
Journal ArticleDOI
How Bulk Sensitive is Hard X-ray Photoelectron Spectroscopy: Accounting for the Cathode–Electrolyte Interface when Addressing Oxygen Redox
Zachary W. Lebens-Higgins,Hyeseung Chung,Mateusz Zuba,Jatinkumar Rana,Yixuan Li,Nicholas V. Faenza,Nathalie Pereira,Bryan D. McCloskey,Bryan D. McCloskey,Fanny Rodolakis,Wanli Yang,M. Stanley Whittingham,Glenn G. Amatucci,Ying Shirley Meng,Tien-Lin Lee,Louis F. J. Piper +15 more
TL;DR: Claims of oxygen redox relying on photoelectron spectroscopy must explicitly account for the surface sensitivity of this technique and the extent of the cathode degradation layer.
References
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Journal ArticleDOI
Building better batteries
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