Oxygen-Deficient Stannic Oxide/Graphene for Ultrahigh-Performance Supercapacitors and Gas Sensors
1
School of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, China
2
The Green Aerotechnics Research Institute, Chongqing Jiaotong University, Chongqing 400714, China
3
College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
4
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2021, 11(2), 372; https://doi.org/10.3390/nano11020372
Received: 7 January 2021
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Revised: 23 January 2021
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Accepted: 26 January 2021
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Published: 2 February 2021
(This article belongs to the Special Issue State-of-the-Art Nanomaterials and Nanotechnology in China)
The metal oxides/graphene nanocomposites have great application prospects in the fields of electrochemical energy storage and gas sensing detection. However, rational synthesis of such materials with good conductivity and electrochemical activity is the topical challenge for high-performance devices. Here, SnO2/graphene nanocomposite is taken as a typical example and develops a universal synthesis method that overcome these challenges and prepares the oxygen-deficient SnO2 hollow nanospheres/graphene (r-SnO2/GN) nanocomposite with excellent performance for supercapacitors and gas sensors. The electrode r-SnO2/GN exhibits specific capacitance of 947.4 F g−1 at a current density of 2 mA cm−2 and of 640.0 F g−1 even at 20 mA cm−2, showing remarkable rate capability. For gas-sensing application, the sensor r-SnO2/GN showed good sensitivity (~13.8 under 500 ppm) and short response/recovering time toward methane gas. These performance features make r-SnO2/GN nanocomposite a promising candidate for high-performance energy storage devices and gas sensors.
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Keywords:
oxygen vacancy; r-SnO2/GN; supercapacitors; gas sensors
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MDPI and ACS Style
Lin, L.; Chen, S.; Deng, T.; Zeng, W. Oxygen-Deficient Stannic Oxide/Graphene for Ultrahigh-Performance Supercapacitors and Gas Sensors. Nanomaterials 2021, 11, 372. https://doi.org/10.3390/nano11020372
AMA Style
Lin L, Chen S, Deng T, Zeng W. Oxygen-Deficient Stannic Oxide/Graphene for Ultrahigh-Performance Supercapacitors and Gas Sensors. Nanomaterials. 2021; 11(2):372. https://doi.org/10.3390/nano11020372
Chicago/Turabian StyleLin, Liyang, Susu Chen, Tao Deng, and Wen Zeng. 2021. "Oxygen-Deficient Stannic Oxide/Graphene for Ultrahigh-Performance Supercapacitors and Gas Sensors" Nanomaterials 11, no. 2: 372. https://doi.org/10.3390/nano11020372
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