PMID- 28715632
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180727
LR  - 20180727
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 9
IP  - 31
DP  - 2017 Aug 9
TI  - All-Graphene Oxide Flexible Solid-State Supercapacitors with Enhanced 
      Electrochemical Performance.
PG  - 26151-26160
LID - 10.1021/acsami.7b04180 [doi]
AB  - The rapid development of flexible and wearable electronics has led to an increase 
      in the demand for flexible supercapacitors with enhanced electrochemical 
      performance. Graphene oxide (GO) and reduced GO (rGO) exhibit several key 
      properties required for supercapacitor components. Although solid-state 
      rGO/GO/rGO supercapacitors with unique structures are promising, their moderate 
      capacitance is inadequate for practical applications. Herein, we report a 
      flexible solid-state rGO/GO/rGO supercapacitor comprising H(2)SO(4)-intercalated 
      GO electrolyte/separator and pseudocapacitive rGO electrodes, which demonstrate 
      excellent electrochemical performance. The resulting supercapacitor delivered an 
      areal capacitance of 14.5 mF cm(-2), which is among the highest values achieved 
      for any rGO/GO/rGO supercapacitor. High ionic concentration and fast ion 
      conduction in the H(2)SO(4)-intercalated GO electrolyte/separator and abundant CH 
      defects, which serve as pseudocapacitive sites on the rGO electrode, were 
      responsible for the high capacitance of this device. The rGO electrode, well 
      separated by the H(2)SO(4) molecular spacer, supplied highly efficient ion 
      transport channels, leading to excellent rate capability. The highly packed rGO 
      electrode and high specific capacitance resulted in a high volumetric energy 
      density (1.24 mWh cm(-3)) observed in this supercapacitor. The structure, without 
      a clear interface between GO and rGO, provides extremely low resistance and 
      flexibility for devices. Our device operated in air (25  degrees C 40%) without the use 
      of external electrolytes, conductive additives, and binders. Furthermore, we 
      demonstrate a simple and versatile technique for supercapacitor fabrication by 
      combining photoreduction and electrochemical treatment. These advantages are 
      attractive for developing novel carbon-based energy devices with high device 
      performance and low fabrication costs.
FAU - Ogata, Chikako
AU  - Ogata C
AUID- ORCID: 0000-0002-3889-9512
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
FAU - Kurogi, Ruriko
AU  - Kurogi R
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
FAU - Awaya, Keisuke
AU  - Awaya K
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
FAU - Hatakeyama, Kazuto
AU  - Hatakeyama K
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
FAU - Taniguchi, Takaaki
AU  - Taniguchi T
AD  - International Center for Materials Nanoarchitectonics (WPI-MANA), National 
      Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, 
      Japan.
FAU - Koinuma, Michio
AU  - Koinuma M
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
FAU - Matsumoto, Yasumichi
AU  - Matsumoto Y
AD  - Graduate School of Science and Technology Kumamoto University , 2-39-1 Kurokami, 
      Chuo-ku, Kumamoto 860-8555, Japan.
LA  - eng
PT  - Journal Article
DEP - 20170731
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
OTO - NOTNLM
OT  - all-carbon
OT  - flexible
OT  - graphene oxide
OT  - proton conduction
OT  - pseudocapacitor
OT  - reduced graphene oxide
OT  - solid-state electrolyte
OT  - supercapacitor
EDAT- 2017/07/18 06:00
MHDA- 2017/07/18 06:01
CRDT- 2017/07/18 06:00
PHST- 2017/07/18 06:00 [pubmed]
PHST- 2017/07/18 06:01 [medline]
PHST- 2017/07/18 06:00 [entrez]
AID - 10.1021/acsami.7b04180 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2017 Aug 9;9(31):26151-26160. doi: 
      10.1021/acsami.7b04180. Epub 2017 Jul 31.