Journal ArticleDOI
Challenges for Rechargeable Li Batteries
John B. Goodenough,Youngsik Kim +1 more
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TLDR
In this paper, the authors reviewed the challenges for further development of Li rechargeable batteries for electric vehicles and proposed a nonflammable electrolyte with either a larger window between its lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) or a constituent that can develop rapidly a solid/ electrolyte-interface (SEI) layer to prevent plating of Li on a carbon anode during a fast charge of the battery.Abstract:
The challenges for further development of Li rechargeable batteries for electric vehicles are reviewed. Most important is safety, which requires development of a nonflammable electrolyte with either a larger window between its lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) or a constituent (or additive) that can develop rapidly a solid/ electrolyte-interface (SEI) layer to prevent plating of Li on a carbon anode during a fast charge of the battery. A high Li-ion conductivity (σ Li > 10 ―4 S/cm) in the electrolyte and across the electrode/ electrolyte interface is needed for a power battery. Important also is an increase in the density of the stored energy, which is the product of the voltage and capacity of reversible Li insertion/extraction into/from the electrodes. It will be difficult to design a better anode than carbon, but carbon requires formation of an SEI layer, which involves an irreversible capacity loss. The design of a cathode composed of environmentally benign, low-cost materials that has its electrochemical potential μ C well-matched to the HOMO of the electrolyte and allows access to two Li atoms per transition-metal cation would increase the energy density, but it is a daunting challenge. Two redox couples can be accessed where the cation redox couples are "pinned" at the top of the O 2p bands, but to take advantage of this possibility, it must be realized in a framework structure that can accept more than one Li atom per transition-metal cation. Moreover, such a situation represents an intrinsic voltage limit of the cathode, and matching this limit to the HOMO of the electrolyte requires the ability to tune the intrinsic voltage limit. Finally, the chemical compatibility in the battery must allow a long service life.read more
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Interfaces and Interphases in All-Solid-State Batteries with Inorganic Solid Electrolytes.
TL;DR: The distinctive features of the typical interfaces and interphases in ASSBs are presented and the recent work on identifying, probing, understanding, and engineering them are summarized.
Journal ArticleDOI
Preparation of MoS2‐Coated Three‐Dimensional Graphene Networks for High‐Performance Anode Material in Lithium‐Ion Batteries
TL;DR: The MoS2 /3DGN composite, used as an anode material for lithium-ion batteries, shows excellent electrochemical performance, which exhibits reversible capacities and high current density, indicating its good cycling performance.
Superconcentrated Electrolytes for a High-Voltage Lithium-Ion Battery
TL;DR: In this article, a superconcentrated LiN(SO2F)2/dimethyl carbonate electrolyte was proposed to solve the problem of metal-ion dissolution at high voltages.
Journal ArticleDOI
In situ atomic-scale imaging of electrochemical lithiation in silicon
Xiao Hua Liu,Jiangwei Wang,Shan Huang,Feifei Fan,Xu Huang,Yang Liu,Sergiy Krylyuk,Sergiy Krylyuk,Jinkyoung Yoo,Shadi A. Dayeh,Albert V. Davydov,Scott X. Mao,Scott X. Mao,S. Tom Picraux,Sulin Zhang,Ju Li,Ting Zhu,Jian Yu Huang +17 more
TL;DR: It is shown that in situ transmission electron microscopy can be used to study the dynamic lithiation process of single-crystal silicon with atomic resolution and observe a sharp interface between the crystalline silicon and an amorphous Li(x)Si alloy.
Journal ArticleDOI
Highly Stable Lithium Metal Batteries Enabled by Regulating the Solvation of Lithium Ions in Nonaqueous Electrolytes
Xue-Qiang Zhang,Xiang Chen,Xin-Bing Cheng,Bo-Quan Li,Xin Shen,Chong Yan,Jia-Qi Huang,Qiang Zhang +7 more
TL;DR: Insight is provided into understanding the critical role of the solvation of lithium ions in forming the SEI and delivering an effective route to optimize electrolytes for safe lithium metal batteries.
References
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High-performance lithium battery anodes using silicon nanowires
Candace K. Chan,Hailin Peng,Gao Liu,Kevin McIlwrath,Xiao Feng Zhang,Robert A. Huggins,Yi Cui +6 more
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Journal ArticleDOI
Nonaqueous liquid electrolytes for lithium-based rechargeable batteries.
TL;DR: The phytochemical properties of Lithium Hexafluoroarsenate and its Derivatives are as follows: 2.2.1.
Journal ArticleDOI
Nanomaterials for rechargeable lithium batteries
TL;DR: Some of the recent scientific advances in nanomaterials, and especially in nanostructured materials, for rechargeable lithium-ion batteries are reviewed.