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
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Dual-ion batteries: The emerging alternative rechargeable batteries
Yiming Sui,Chaofeng Liu,Robert C. Massé,Zachary G. Neale,Muhammad Atif,Mohamad S. AlSalhi,Guozhong Cao +6 more
TL;DR: In this paper, a review of the challenges in the current work on dual-ion batteries with subcategories of positive and negative electrodes (cathode and anode), and electrolytes and comparing the strategies for improvements with better fundamental understanding of DIBs is presented.
Journal ArticleDOI
Freestanding three-dimensional core–shell nanoarrays for lithium-ion battery anodes
Guoqiang Tan,Guoqiang Tan,Feng Wu,Yifei Yuan,Yifei Yuan,Renjie Chen,Teng Zhao,Ying Yao,Ji Qian,Jianrui Liu,Yusheng Ye,Reza Shahbazian-Yassar,Jun Lu,Khalil Amine +13 more
TL;DR: Cable-like copper oxide/carbon-nitride core–shell nanostructures accommodate the volume change during lithiation−delithiation processes, the three-dimensional arrays provide abundant electroactive zones and electron/ion transport paths, and the monolithic sandwich-type configuration without additional binders or conductive agents improves energy/power densities of the whole electrode.
Journal ArticleDOI
Surface Structural Transition Induced by Gradient Polyanion-Doping in Li-Rich Layered Oxides: Implications for Enhanced Electrochemical Performance
Ying Zhao,Jiatu Liu,Shuangbao Wang,Ran Ji,Qingbing Xia,Zhengping Ding,Weifeng Wei,Yong Liu,Peng Wang,Douglas G. Ivey +9 more
TL;DR: In this article, a gradient polyanion-doping strategy is developed to initiate surface structural transition to form a spinel-like surface nanolayer and a polyanions-doped layered core material in LLOs simultaneously.
Journal ArticleDOI
Approaching the limits of cationic and anionic electrochemical activity with the Li-rich layered rocksalt Li3IrO4
Arnaud J. Perez,Quentin Jacquet,Dmitry Batuk,Antonella Iadecola,Matthieu Saubanère,Gwenaëlle Rousse,Dominique Larcher,Hervé Vezin,Marie-Liesse Doublet,Jean-Marie Tarascon +9 more
TL;DR: Li3IrO4 (O/M) as discussed by the authors is a new positive-electrode material that can reversibly take up and release 3.5 electrons per Ir and possesses the highest capacity ever reported for any positive insertion electrode.
Journal ArticleDOI
Ultrahigh power and energy density in partially ordered lithium-ion cathode materials
Huiwen Ji,Huiwen Ji,Jinpeng Wu,Zijian Cai,Zijian Cai,Jue Liu,Deok-Hwang Kwon,Deok-Hwang Kwon,Hyun-Chul Kim,Alexander Urban,Joseph K. Papp,Emily E. Foley,Yaosen Tian,Yaosen Tian,Mahalingam Balasubramanian,Haegyeom Kim,Raphaële J. Clément,Bryan D. McCloskey,Bryan D. McCloskey,Wanli Yang,Gerbrand Ceder,Gerbrand Ceder +21 more
TL;DR: In this paper, a partial spinel-like cation order was used to eliminate phase transitions typical of ordered spinels and enable a larger practical capacity, while lithium excess is synergistically used with fluorine substitution to create a high lithium mobility.
References
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Journal ArticleDOI
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TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Journal ArticleDOI
Building better batteries
TL;DR: Researchers must find a sustainable way of providing the power their modern lifestyles demand to ensure the continued existence of clean energy sources.