Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes

Julian D. Esper, Ying Zhuo, Maïssa K.S. Barr, Tadahiro Yokosawa, Erdmann Spiecker, Dominique de Ligny, Julien Bachmann, Wolfgang Peukert, Stefan Romeis

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

3 Цитирования (Scopus)

Аннотация

Novel CoO-Li2O-B2O3 and CoO-GeO2-Li2O-B2O3 flake-like glass particles for battery applications are produced by an innovative technique: Glasses from melt quenching are processed into micron-sized glass flakes in a stirred media mill. Processing under well-controlled conditions yields flake-like particles with high aspect ratios which are suitable for anodes in Lithium-ion batteries. Electrochemical characterization by cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge/discharge cycles and rate capability measurements indicates that the flakes show superior electrochemical properties compared to the bulk glass counterparts with a stable specific capacity of 620 mAh g−1 after 100 cycles. The majority of charge is stored by Li+ ion diffusion inside the material and impedance spectroscopy shows enhanced lithium ion diffusion capabilities of the flakes. The proposed fabrication process is performed under ambient conditions and is simple, cost-efficient, fully scalable and can be easily transferred to other glass compositions with electrochemically active metal oxides.

Язык оригиналаанглийский
Страницы (с-по)218-231
Число страниц14
ЖурналPowder Technology
Том363
DOI
СостояниеОпубликовано - 1 мар 2020

Предметные области Scopus

  • Химическая технология (все)

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