Journal
ENERGY STORAGE MATERIALS
Volume 25, Issue -, Pages 695-701Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2019.09.017
Keywords
Niobium oxide; Puffed rice carbon; Solid-state; Lithium ion batteries; Gel polymer electrolyte
Funding
- National Natural Science Foundation of China [51772272, 51728204]
- Fundamental Research Funds for the Central Universities [2018QNA4011]
- Qianjiang Talents Plan D [QJD1602029]
- Startup Foundation for HundredTalent Program of Zhejiang University
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The advancement of high-power solid-state lithium ion batteries (LIBs) is closely in connection with the breakthrough of electrode materials. In this work, for the first time, we report a popcorn-like niobium oxide with cloned hierarchical architecture via sacrificial puffed rice carbon (PRC) template and solvothermal method. The popcorn-like Nb2O5 (PL-Nb2O5) shows a tertiary hierarchical macrocellular structure with cross-linked 2D secondary Nb2O5 nanoflakes, which are composed of primary self-assembled Nb2O5 nanocrystals. Impressively, this exquisite hierarchical architecture offers continuous fast transport paths for ion/electron and improves the specific surface area & porosity, resulting in accelerated reaction kinetics and good compatibility with gel polymer electrolyte (GPE). Accordingly, the popcorn-like Nb2O5 electrode is endowed with superior lithium ion storage performance in gel polymer electrolyte with good high-rate capacities (126 mA h g(-1) at 5C and 103 mA h g(-1) at 10C) and stable long-term cycling performance (75 mA h g(-1) after 1000 cycles at 5C). Our findings propose a new bioinspired template way for construction of cloned metal oxides architectures for solid-state energy storage systems.
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