Premium
A Novel High‐Energy Hybrid Supercapacitor with an Anatase TiO 2 –Reduced Graphene Oxide Anode and an Activated Carbon Cathode
Author(s) -
Kim Haegyeom,
Cho MinYoung,
Kim MokHwa,
Park KyuYoung,
Gwon Hyeokjo,
Lee Yunsung,
Roh Kwang Chul,
Kang Kisuk
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300467
Subject(s) - supercapacitor , materials science , anatase , graphene , anode , cathode , electrolyte , specific energy , oxide , chemical engineering , power density , nanotechnology , capacitance , power (physics) , electrode , electrical engineering , organic chemistry , photocatalysis , metallurgy , chemistry , physics , engineering , catalysis , quantum mechanics
A hybrid supercapacitor with high energy and power densities is reported. It comprises a composite anode of anatase TiO 2 and reduced graphene oxide and an activated carbon cathode in a non‐aqueous electrolyte. While intercalation compounds can provide high energy typically at the expense of power, the anatase TiO 2 nanoparticles are able to sustain both high energy and power in the hybrid supercapacitor. At a voltage range from 1.0 to 3.0 V, 42 W h kg −1 of energy is achieved at 800 W kg −1 . Even at a 4‐s charge/discharge rate, an energy density as high as 8.9 W h kg −1 can be retained. The high energy and power of this hybrid supercapacitor bridges the gap between conventional batteries with high energy and low power and supercapacitors with high power and low energy.