Journal ArticleDOI
Non-flammable electrolytes with high salt-to-solvent ratios for Li-ion and Li-metal batteries
Ziqi Zeng,Vijayakumar Murugesan,Kee Sung Han,Xiaoyu Jiang,Yuliang Cao,Lifen Xiao,Xinping Ai,Hanxi Yang,Ji-Guang Zhang,Maria L. Sushko,Jun Liu +10 more
TLDR
In this article, an approach that improves the stability of non-flammable phosphate electrolytes by adjusting the molar ratio of Li salt to solvent was proposed. But their compatibility with electrode materials, especially graphite anodes, remains an obstacle owing to the strong catalytic activity of the anode surfaces.Abstract:
Non-flammable electrolytes could intrinsically eliminate fire hazards and improve battery safety, but their compatibility with electrode materials, especially graphite anodes, remains an obstacle owing to the strong catalytic activity of the anode surfaces. Here, we report an approach that improves the stability of non-flammable phosphate electrolytes by adjusting the molar ratio of Li salt to solvent. At a high Li salt-to-solvent molar ratio (~1:2), the phosphate solvent molecules are mostly coordinated with the Li+ cations, and the undesired reactivity of the solvent molecules toward the graphite anode can be effectively suppressed. High cycling Coulombic efficiency (99.7%), good cycle life and safe operation of commercial 18650 Li-ion cells with these electrolytes are demonstrated. In addition, these non-flammable electrolytes show reduced reactivity toward Li-metal electrodes. Non-dendritic Li-metal plating and stripping in Li–Cu half-cells are demonstrated with high Coulombic efficiency (>99%) and good stability.read more
Citations
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Journal ArticleDOI
Pathways for practical high-energy long-cycling lithium metal batteries
Jun Liu,Zhenan Bao,Yi Cui,Eric J. Dufek,John B. Goodenough,Peter G. Khalifah,Qiuyan Li,Bor Yann Liaw,Ping Liu,Arumugam Manthiram,Y. Shirley Meng,Venkat R. Subramanian,Venkat R. Subramanian,Michael F. Toney,Vilayanur V. Viswanathan,M. Stanley Whittingham,Jie Xiao,Wu Xu,Jihui Yang,Xiao-Qing Yang,Ji-Guang Zhang +20 more
TL;DR: Liu et al. as mentioned in this paper discuss crucial conditions needed to achieve a specific energy higher than 350 Wh kg−1, up to 500 Wh kg −1, for rechargeable Li metal batteries using high-nickel-content lithium nickel manganese cobalt oxides as cathode materials.
Journal ArticleDOI
Guidelines and trends for next-generation rechargeable lithium and lithium-ion batteries.
TL;DR: This review summarizes the current trends and provides guidelines towards achieving next-generation rechargeable Li and Li-ion batteries with higher energy densities, better safety characteristics, lower cost and longer cycle life by addressing batteries using high-voltage cathodes, metal fluoride electrodes, chalcogen electrodes, Li metal anodes, high-capacity anodes as well as useful electrolyte solutions.
Journal ArticleDOI
Advances and issues in developing salt-concentrated battery electrolytes
Yuki Yamada,Yuki Yamada,Jianhui Wang,Jianhui Wang,Seongjae Ko,Eriko Watanabe,Atsuo Yamada,Atsuo Yamada +7 more
TL;DR: The progress made and the road ahead for salt-concentrated electrolytes, an emerging and promising electrolyte candidate are reviewed, including a multi-angle analysis of their advantages and disadvantages together with future perspectives.
Journal ArticleDOI
Solid-state polymer electrolytes with in-built fast interfacial transport for secondary lithium batteries
TL;DR: In this paper, a ring-opening polymerization of molecular ethers inside an electrochemical cell was proposed to produce solid-state polymer electrolytes (SPEs), which retain conformal interfacial contact with all cell components.
Journal ArticleDOI
Monolithic solid-electrolyte interphases formed in fluorinated orthoformate-based electrolytes minimize Li depletion and pulverization
Xia Cao,Xiaodi Ren,Lianfeng Zou,Mark H. Engelhard,William Huang,Hansen Wang,Bethany E. Matthews,Hongkyung Lee,Chaojiang Niu,Bruce W. Arey,Yi Cui,Chongmin Wang,Jie Xiao,Jun Liu,Wu Xu,Ji-Guang Zhang +15 more
TL;DR: In this article, a fluorinated orthoformate-based electrolyte was used to prevent dendritic Li formation and minimise Li loss and volumetric expansion in Li-metal batteries.
References
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Journal ArticleDOI
Density‐functional thermochemistry. III. The role of exact exchange
TL;DR: In this article, a semi-empirical exchange correlation functional with local spin density, gradient, and exact exchange terms was proposed. But this functional performed significantly better than previous functionals with gradient corrections only, and fits experimental atomization energies with an impressively small average absolute deviation of 2.4 kcal/mol.
Journal ArticleDOI
Chemistry with ADF
G. te Velde,F.M. Bickelhaupt,Evert Jan Baerends,C. Fonseca Guerra,S. J. A. van Gisbergen,J.G. Snijders,T. Ziegler +6 more
TL;DR: The “Activation‐strain TS interaction” (ATS) model of chemical reactivity is reviewed as a conceptual framework for understanding how activation barriers of various types of reaction mechanisms arise and how they may be controlled, for example, in organic chemistry or homogeneous catalysis.
Journal ArticleDOI
Spin diffusion measurements : spin echoes in the presence of a time-dependent field gradient
E. O. Stejskal,J. E. Tanner +1 more
TL;DR: In this article, a derivation of the effect of a time-dependent magnetic field gradient on the spin-echo experiment, particularly in the presence of spin diffusion, is given.
Journal ArticleDOI
"Water-in-salt" electrolyte enables high-voltage aqueous lithium-ion chemistries.
Liumin Suo,Oleg Borodin,Tao Gao,Marco Olguin,Janet Ho,Xiulin Fan,Chao Luo,Chunsheng Wang,Kang Xu +8 more
TL;DR: A highly concentrated aqueous electrolyte whose window was expanded to ~3.0 volts with the formation of an electrode-electrolyte interphase, which could potentially be replaced with a safer aQueous alternative to lithium-ion batteries.
Journal ArticleDOI
High-power all-solid-state batteries using sulfide superionic conductors
Yuki Kato,Yuki Kato,Satoshi Hori,Toshiya Saito,Kota Suzuki,Masaaki Hirayama,Akio Mitsui,Masao Yonemura,Hideki Iba,Ryoji Kanno +9 more
TL;DR: Li9.54Si1.74P1.44S11.7Cl0.6P3S12 as discussed by the authors showed that Li 9.54 Si 1.54P 1.74Si 1.44 S11.3 has high specific power that is superior to that of conventional cells with liquid electrolytes.