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Stable Low‐Current Electrodeposition of α‐MnO 2 on Superaligned Electrospun Carbon Nanofibers for High‐Performance Energy Storage
Author(s) -
Liu Yiyang,
Zeng Zheng,
Bloom Brian,
Waldeck David H.,
Wei Jianjun
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703237
Subject(s) - supercapacitor , materials science , energy storage , electrolyte , nanomaterials , current collector , nanofiber , carbon nanofiber , oxide , electrode , nanotechnology , current (fluid) , carbon fibers , carbon nanotube , chemical engineering , composite material , electrochemistry , composite number , metallurgy , electrical engineering , chemistry , power (physics) , physics , engineering , quantum mechanics
Metal oxide/carbonaceous nanomaterials are promising candidates for energy‐storage applications. However, inhomogeneous mass and charge transfer across the electrode/electrolyte interface due to unstable metal oxide/carbonaceous nanomaterial synthesis limit their performance in supercapacitors. Here, it is shown that the above problems can be mitigated through stable low‐current electrodeposition of MnO 2 on superaligned electrospun carbon nanofibers (ECNFs). The key to this approach is coupling a self‐designed four steel poles collector for aligned ECNFs and a constant low‐current (40 µA) electrodeposition technique to form a uniform Na + ‐induced α‐MnO 2 film which proceeds by a time‐dependent growth mechanism involving cluster‐“kebab” structures and ending with a compact, uniform MnO 2 film for high‐performance energy storage.