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
More filters
Journal ArticleDOI
A Redox Couple Strategy Enables Long‐Cycling Li‐ and Mn‐Rich Layered Oxide Cathodes by Suppressing Oxygen Release
Qinong Shao,Panyu Gao,Chen-Yu Yan,Mingxia Gao,Wubin Du,Jian Chen,Yaxiong Yang,Jian Gan,Zhijun Wu,Chenyang Zhang,Gairong Chen,Xusheng Zheng,Yue Lin,Yinzhu Jiang,Wenping Sun,Yongfeng Liu,Hongge Pan +16 more
TL;DR: Li and Mn-rich layered oxides (LMROs) are considered the most promising cathode candidates for next-generation high-energy lithium-ion batteries as mentioned in this paper , however, the poor cycling stability and fast voltage fading resulting from oxygen release during charging severely hinders their practical application.
Journal ArticleDOI
Clearing surficial charge-transport obstacles to boost the performance of lithium-rich layered oxides
Luo Shuliang,Huajun Guo,Shihao Feng,Zhixing Wang,Xinhai Li,Peng Wenjie,Guochun Yan,Jiexi Wang +7 more
TL;DR: In this article, Li2RuO3 coating layer, acting as an electronic/ionic conductive network, is introduced to lithium-rich Mn-based material that is known for its low rate capability and quick capacity fading.
Journal ArticleDOI
Tailoring of Gradient Particles of Li-Rich Layered Cathodes with Mitigated Voltage Decay for Lithium-Ion Batteries.
Xiaokang Ju,Xiaokang Ju,Xu Hou,Thomas Beuse,Zhongqing Liu,Leilei Du,Jan-Paul Brinkmann,Elie Paillard,Taihong Wang,Martin Winter,Martin Winter,Jie Li +11 more
TL;DR: A material model combining Li rich and high Ni layered cathodes is shown to be effective in creating balance between mitigated voltage decay and high energy density.
Journal ArticleDOI
Associating and Tuning Sodium and Oxygen Mixed‐Ion Conduction in Niobium‐Based Perovskites
Journal ArticleDOI
Elucidation of Active Oxygen Sites upon Delithiation of Li3IrO4
Haifeng Li,Arnaud J. Perez,Arnaud J. Perez,Beata Taudul,Teak D. Boyko,John W. Freeland,Marie-Liesse Doublet,Jean-Marie Tarascon,Jean-Marie Tarascon,Jean-Marie Tarascon,Jordi Cabana +10 more
TL;DR: In this article, the redox activity at oxide ligands in addition to conventional transition metal couples is exploited to increase the storage capacity of battery cathodes, which can be achieved by tapping into redox activations at the ligands.
References
More filters
Journal ArticleDOI
Generalized Gradient Approximation Made Simple
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.
Journal ArticleDOI
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
TL;DR: The effective ionic radii of Shannon & Prewitt [Acta Cryst. (1969), B25, 925-945] are revised to include more unusual oxidation states and coordinations as mentioned in this paper.
Journal ArticleDOI
Issues and challenges facing rechargeable lithium batteries
TL;DR: A brief historical review of the development of lithium-based rechargeable batteries is presented, ongoing research strategies are highlighted, and the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems are discussed.
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.