Self-Standing Porous LiCoO2 Nanosheet Arrays as 3D Cathodes for Flexible Li-Ion Batteriesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 марта 2018 г.
Аннотация:Self-standing electrodes are the key to realize flexible Li-ion batteries. However,
fabrication of self-standing cathodes is still a major challenge. In this work,
porous LiCoO2 nanosheet arrays are grown on Au-coated stainless steel (Au/SS)
substrates via a facile “hydrothermal lithiation” method using Co3O4 nanosheet
arrays as the template followed by quick annealing in air. The binder-free and
self-standing LiCoO2 nanosheet arrays represent the 3D cathode and exhibit
superior rate capability and cycling stability. In specific, the LiCoO2 nanosheet
array electrode can deliver a high reversible capacity of 104.6 mA h g−1
at 10 C rate and achieve a capacity retention of 81.8% at 0.1 C rate after 1000 cycles.
By coupling with Li4Ti5O12 nanosheet arrays as anode, an all-nanosheet array
based LiCoO2//Li4Ti5O12 flexible Li-ion battery is constructed. Benefiting from
the 3D nanoarchitectures for both cathode and anode, the flexible LiCoO2//
Li4Ti5O12 battery can deliver large specific reversible capacities of 130.7 mA
h g−1 at 0.1 C rate and 85.3 mA h g−1 at 10 C rate (based on the weight of
cathode material). The full cell device also exhibits good cycling stability with
80.5% capacity retention after 1000 cycles at 0.1 C rate, making it promising
for the application in flexible Li-ion batteries.