Beyond Typical Electrolytes for Energy Dense Batteries

Mohtadi, Rana

doi:10.3390/molecules25081791

Cited by 25 publications

(21 citation statements)

References 118 publications

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“…Tremendous advances in electrolyte development have been achieved in the past years, resulting in practical and non‐corrosive magnesium electrochemistry [6,7] . Nevertheless, the development of high‐performance cathode materials has so far limited the commercial viability of RMB technology [8–13] . In fact, the bivalent nature of the magnesium ion results in strong interactions with insertion electrode materials, and consequently, the diffusion of ions in the materials can be orders of magnitude more sluggish than that of monovalent cations (e. g., Na and Li).…”

Section: Figurementioning

confidence: 99%

A Self‐Conditioned Metalloporphyrin as a Highly Stable Cathode for Fast Rechargeable Magnesium Batteries

Abouzari‐Lotf

Azmi

et al. 2021

ChemSusChem

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Development of practical rechargeable Mg batteries (RMBs) is impeded by their limited cycle life and rate performance of cathodes. As demonstrated herein, a copper‐porphyrin with meso‐functionalized ethynyl groups is capable of reversible two‐ and four‐electron storage at an extremely fast rate (tested up to 53 C). The reversible four‐electron redox process with cationic‐anionic contributions resulted in a specific discharge capacity of 155 mAh g−1 at the high current density of 1000 mA g−1. Even at 4000 mA g−1, it still delivered >70 mAh g−1 after 500 cycles, corresponding to an energy density of >92 Wh kg−1 at a high power of >5100 W kg−1. The ability to provide such high‐rate performance and long‐life opens the way to the development of practical cathodes for multivalent metal batteries.

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Section: Figurementioning

confidence: 99%

A Self‐Conditioned Metalloporphyrin as a Highly Stable Cathode for Fast Rechargeable Magnesium Batteries

Abouzari‐Lotf

Azmi

et al. 2021

ChemSusChem

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“…The large and highly symmetrical borate cages allow for thermally induced orientational disorder that is key to high ionic conductivities, as the transition to a sublattice of rotationally fluidic anions facilitates liquid-like interstitial cation diffusion . A range of novel metal hydrides have recently demonstrated exceptionally high ionic conductivity and large electrochemical stabilities also toward metallic anodes, such as Li, Na, Mg, or Ca, which inspire development of batteries far beyond the commercial lithium battery. − …”

Section: Introductionmentioning

confidence: 99%

Polymorphism of Calcium Decahydrido-closo-decaborate and Characterization of Its Hydrates

Jørgensen

Zhou

et al. 2021

Inorg. Chem.

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Metal closo-borates and their derivatives have shown promise in several fields of application from cancer therapy to solidstate electrolytes partly owing to their stability in aqueous solutions and high thermal stability. We report the synthesis and structural analysis of αand β-CaB 10 H 10 , which are structurally and energetically similar, both showing a tetrahedral coordination of Ca 2+ to four closo-borate cages. The main distinctions between the αand βpolymorph are found in the crystal system (monoclinic or orthorhombic), topology (wurtzite or cag), and the degree of displacement of Ca 2+ from the center of the coordination tetrahedron. Neutron vibrational spectroscopy measurements further revealed distinct perturbations in the cation−anion interactions arising from the different crystal structures. We also synthesized and structurally investigated five stoichiometric hydrates, CaB 10 H 10 • xH 2 O, x = 1, 4, 5, 6, and 7, and discovered an order−disorder polymorphic transition, αto β-CaB 10 H 10 •6H 2 O. The hydrates reveal a rich structural diversity with ordered structures, CaB 10 H 10 •xH 2 O, x = 1, 4, 5, 6, and 7, as well as disordered structures, x = 6 and 8. The latter allow for a continuum of compositions within 7−8 molecules of crystal water. The DFT-optimized experimental crystal structures reveal complex networks of three types of hydrogen interactions: dihydrogen bonds, B−H δ− ••• +δ H−O; hydrogen− hydrogen interactions, B−H•••H−B; and hydrogen bonds, O−H δ+ ••• −δ O−H. A rather short B−H•••H−B (2.14 Å) interaction is observed for CaB 10 H 10 •5H 2 O, which is locally stabilized by four hydrogen bonds.

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“…Several classes of inorganic solid electrolytes with high Li conductivity have been explored. [ 69 ] The most prominent ones include garnets, [ 70 ] NASICON‐type materials [ 71 ] and perovskites [ 7a ] (usually abbreviated as “oxides”), binary (P x S y ) thiophosphates (“sulfides” [ 72 ] ), halide‐containing materials such as argyrodites [ 73 ] as well as rare‐earth halides (“halides” [ 74 ] ), and closo‐borates (“hydrides” [ 75 ] ). Some of these materials can have very high room temperature conductivities (>10 −3 S cm −1 ) in the range of (organic) liquid electrolytes and Li‐ion transference numbers close to unity, which makes them very appealing for LMBs.…”

Section: Mysteries In LI Deposition and Perspectives For Deeper Under...mentioning

confidence: 99%

Promoting Mechanistic Understanding of Lithium Deposition and Solid‐Electrolyte Interphase (SEI) Formation Using Advanced Characterization and Simulation Methods: Recent Progress, Limitations, and Future Perspectives

Dong

Jie

et al. 2022

Advanced Energy Materials

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In recent years, due to its great promise in boosting the energy density of lithium batteries for future energy storage, research on the Li metal anode, as an alternative to the graphite anode in Li‐ion batteries, has gained significant momentum. However, the practical use of Li metal anodes has been plagued by unstable Li (re)deposition and poor cyclability. Although tremendous efforts have been devoted to the stabilization of Li metal anodes, the mechanisms of electrochemical (re‐)deposition/dissolution of Li and solid‐electrolyte‐interphase (SEI) formation remain elusive. This article highlights the recent mechanistic understandings and observations of Li deposition/dissolution and SEI formation achieved from advanced characterization techniques and simulation methods, and discusses major limitations and open questions in these processes. In particular, the authors provide their perspectives on advanced and emerging/potential methods for obtaining new insights into these questions. In addition, they give an outlook into cutting‐edge interdisciplinary research topics for Li metal anodes. It pushes beyond the current knowledge and is expected to accelerate development toward a more in‐depth and comprehensive understanding, in order to guide future research on Li metal anodes toward practical application.

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Beyond Typical Electrolytes for Energy Dense Batteries

Cited by 25 publications

References 118 publications

A Self‐Conditioned Metalloporphyrin as a Highly Stable Cathode for Fast Rechargeable Magnesium Batteries

A Self‐Conditioned Metalloporphyrin as a Highly Stable Cathode for Fast Rechargeable Magnesium Batteries

Polymorphism of Calcium Decahydrido-closo-decaborate and Characterization of Its Hydrates

Promoting Mechanistic Understanding of Lithium Deposition and Solid‐Electrolyte Interphase (SEI) Formation Using Advanced Characterization and Simulation Methods: Recent Progress, Limitations, and Future Perspectives

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