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High Energy Density and Stable Three‐Dimensionally Structured Se‐Loaded Bicontinuous Porous Carbon Battery Electrodes
Author(s) -
Wang Junjie,
Qu Subing,
Zhang Runyu,
Yang Ke,
Zhang Shiyan,
Nuzzo Ralph G.,
Nanda Jagjit,
Braun Paul V.
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202100175
Subject(s) - electrolyte , materials science , electrode , battery (electricity) , chemical engineering , porosity , diethyl carbonate , fade , carbon fibers , nanotechnology , composite material , chemistry , composite number , power (physics) , physics , quantum mechanics , ethylene carbonate , computer science , engineering , operating system
3D‐structured Se‐loaded bicontinuous porous carbon (BPC) electrodes are fabricated through colloidal templating of BPC followed by pulsed‐voltage Se electrodeposition. The resultant electrodes are found to deliver a specific capacity of 665 mAh g −1 at a rate of 0.1 C, near the theoretical value for Se. When a vinylene carbonate (VC) containing electrolyte is utilized, the capacity fade over 500 cycles at 1 C rate is as small as a few percent. Impedance measurements and physical characterization of cycled electrodes indicate the exceptionally stable cycling performance is possibly due to VC resulting in the formation of a stable solid electrolyte interface (SEI) during cycling. Along with the cycling stability, the rate performance of the 3D Se/BPC electrodes is also good. Due to the bicontinuous structure of carbonaceous current collector at rates as high as 5 C, the deliverable capacity is about 300 mAh g −1 .