A lithium superionic conductor

Kamaya, Noriaki; Homma, Kenji; Yamakawa, Yuichiro; Hirayama, Masaaki; Kanno, Ryoji; Yonemura, Masao; Kamiyama, Takashi; Kato, Yoshifumi; Hama, Shigenori; Kawamoto, Koji; Mitsui, Akira

doi:10.1038/nmat3066

Cited by 4,007 publications

(3,788 citation statements)

References 26 publications

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“…Single‐ion polymer159 and solid electrolyte160 are also useful strategies to improve ionic conductivity ( Figure 13 ). Besides the very low ionic conductivity, partial delamination of Li foils and the polymer/solid electrolyte layers is also responsible for capacity fade and failure 161.…”

Section: Sei Regulationmentioning

confidence: 99%

A Review of Solid Electrolyte Interphases on Lithium Metal Anode

et al. 2015

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Lithium metal batteries (LMBs) are among the most promising candidates of high‐energy‐density devices for advanced energy storage. However, the growth of dendrites greatly hinders the practical applications of LMBs in portable electronics and electric vehicles. Constructing stable and efficient solid electrolyte interphase (SEI) is among the most effective strategies to inhibit the dendrite growth and thus to achieve a superior cycling performance. In this review, the mechanisms of SEI formation and models of SEI structure are briefly summarized. The analysis methods to probe the surface chemistry, surface morphology, electrochemical property, dynamic characteristics of SEI layer are emphasized. The critical factors affecting the SEI formation, such as electrolyte component, temperature, current density, are comprehensively debated. The efficient methods to modify SEI layer with the introduction of new electrolyte system and additives, ex‐situ‐formed protective layer, as well as electrode design, are summarized. Although these works afford new insights into SEI research, robust and precise routes for SEI modification with well‐designed structure, as well as understanding of the connection between structure and electrochemical performance, is still inadequate. A multidisciplinary approach is highly required to enable the formation of robust SEI for highly efficient energy storage systems.

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Section: Sei Regulationmentioning

confidence: 99%

A Review of Solid Electrolyte Interphases on Lithium Metal Anode

et al. 2015

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“…Compared with a traditional liquid electrolyte system that has safety risks caused by leakage of flammable and volatile organic solvents, SPEs possess some distinct advantages 3. In addition to improved safety, SPEs have excellent thermal and electrochemical stability which can extend their operating conditions to higher temperatures and higher working voltages.…”

Section: Introductionmentioning

confidence: 99%

High Ion‐Conducting Solid‐State Composite Electrolytes with Carbon Quantum Dot Nanofillers

et al. 2018

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Solid‐state polymer electrolytes (SPEs) with high ionic conductivity are desirable for next generation lithium‐ and sodium‐ion batteries with enhanced safety and energy density. Nanoscale fillers such as alumina, silica, and titania nanoparticles are known to improve the ionic conduction of SPEs and the conductivity enhancement is more favorable for nanofillers with a smaller size. However, aggregation of nanoscale fillers in SPEs limits particle size reduction and, in turn, hinders ionic conductivity improvement. Here, a novel poly(ethylene oxide) (PEO)‐based nanocomposite polymer electrolyte (NPE) is exploited with carbon quantum dots (CQDs) that are enriched with oxygen‐containing functional groups. Well‐dispersed, 2.0–3.0 nm diameter CQDs offer numerous Lewis acid sites that effectively increase the dissociation degree of lithium and sodium salts, adsorption of anions, and the amorphicity of the PEO matrix. Thus, the PEO/CQDs‐Li electrolyte exhibits an exceptionally high ionic conductivity of 1.39 × 10−4 S cm−1 and a high lithium transference number of 0.48. In addition, the PEO/CQDs‐Na electrolyte has ionic conductivity and sodium ion transference number values of 7.17 × 10−5 S cm−1 and 0.42, respectively. It is further showed that all solid‐state lithium/sodium rechargeable batteries assembled with PEO/CQDs NPEs display excellent rate performance and cycling stability.

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“…From a safety viewpoint, NAS batteries that operate at room temperature are strongly desirable as they would be a suitable distributed storage for individual houses. All-solid-state batteries are the safest batteries, because they do not suffer from leakage, volatilization, or flammability, as they employ solid inorganic electrolytes rather than liquid organic electrolytes [6][7][8] . To realize solid-state batteries that operate at ambient and moderate temperatures, superior solid electrolytes that have high Na + ion conductivities at room temperature and close contact with electrode active materials are indispensable.…”

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confidence: 99%

Superionic glass-ceramic electrolytes for room-temperature rechargeable sodium batteries

et al. 2012

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Innovative rechargeable batteries that can effectively store renewable energy, such as solar and wind power, urgently need to be developed to reduce greenhouse gas emissions. All-solid-state batteries with inorganic solid electrolytes and electrodes are promising power sources for a wide range of applications because of their safety, long-cycle lives and versatile geometries. Rechargeable sodium batteries are more suitable than lithium-ion batteries, because they use abundant and ubiquitous sodium sources. solid electrolytes are critical for realizing allsolid-state sodium batteries. Here we show that stabilization of a high-temperature phase by crystallization from the glassy state dramatically enhances the na + ion conductivity. An ambient temperature conductivity of over 10 − 4 s cm − 1 was obtained in a glass-ceramic electrolyte, in which a cubic na 3 Ps 4 crystal with superionic conductivity was first realized. All-solid-state sodium batteries, with a powder-compressed na 3 Ps 4 electrolyte, functioned as a rechargeable battery at room temperature.

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A lithium superionic conductor

Cited by 4,007 publications

References 26 publications

A Review of Solid Electrolyte Interphases on Lithium Metal Anode

A Review of Solid Electrolyte Interphases on Lithium Metal Anode

High Ion‐Conducting Solid‐State Composite Electrolytes with Carbon Quantum Dot Nanofillers

Superionic glass-ceramic electrolytes for room-temperature rechargeable sodium batteries

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