A mechanically robust all-solid-state supercapacitor based on a highly conductive double-network hydrogel electrolyte and Ti3C2Tx MXene electrode with anti-freezing property

Peng, Junbo1; Zhou, Manhua1; Gao, Yafei1; Wang, Jianfeng1; Cao, Yanxia1; Wang, Wanjie1; Wu, Decheng2; Yang, Yanyu1

2021-10-01

10.1039/d1ta06617j

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Hydrogels are peculiarly attractive electrolyte materials for constructing flexible and secure all-solid-state supercapacitors due to their mechanical flexibility, ionic conductivity and noninflammability. However, upon severe mechanical stresses, hydrogel electrolyte-based supercapacitors will undergo irreversible structural damage, which results in dramatically fluctuant energy output. Additionally, invalid mechanical flexibility and serious capacitance degradation at subzero temperature are also urgent issues to be addressed. Herein, a mechanically reliable, exceptional-performance and anti-freezing all-solid-state supercapacitor is constructed from a highly ionic conductive double-network (DN) hydrogel electrolyte, intrinsically powerful Ti3C2Tx MXene film electrode and carbon nanotube film current collector. The DN hydrogel possesses impressive ionic conductivities of 4.8 and 3.6 S m(-1) at room temperature and -20 degrees C, respectively, together with an effective energy-dissipation mechanism and freezing tolerance (<-40 degrees C). The distinct combination endows the assembled supercapacitor with low internal resistance and eminent stress dissipation, which results in extraordinary capacitive performance (capacitance of 297.1 mF cm(-2) and energy density of 14.76 mu W h cm(-2)), remarkable structural reliability and electrochemical stability under multiple severe damages. Even upon consecutive 3 d of trampling, the supercapacitor still delivers an unimpaired capacitance. Significantly, superior freezing tolerance enables the supercapacitor to well maintain high areal capacitance (150.0 mF cm(-2) at 1.0 mA cm(-2)) at -20 degrees C and excellent capacitive stability upon external stresses. Furthermore, a self-powered sensing device is successfully integrated from the hydrogel-based supercapacitor and sensor to accurately detect various human motions. This study will pave a way to develop ultrahigh-performance and freezing-tolerant supercapacitors for wearable power sources against severe mechanical damage.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[52173144,51803188,21725403] ; Key Scientific Research Projects of Colleges and Universities in Henan Province[19A430004] ; China Postdoctoral Science Foundation["2018M642783","2019T120636"] ; Henan Postdoctoral Science Foundation[001801001] ; Key Research and Development and Promotion Projects of Henan Province[212102210635]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000714168300001

ROYAL SOC CHEMISTRY

20214711219099

Carbon nanotubes ; Electrodes ; Electrolytic capacitors ; Energy dissipation ; Fits and tolerances ; Hydrogels ; Polyelectrolytes ; Solid electrolytes ; Supercapacitor

Energy Losses (industrial and residential):525.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electric Components:704.1 ; Nanotechnology:761 ; Colloid Chemistry:801.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Crystalline Solids:933.1

Web of Science

1.Zhengzhou Univ, Coll Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
2.Southern Univ Sci & Technol, Dept Biomed Engn, Shenzhen 518055, Guangdong, Peoples R China

Peng, Junbo,Zhou, Manhua,Gao, Yafei,et al. A mechanically robust all-solid-state supercapacitor based on a highly conductive double-network hydrogel electrolyte and Ti3C2Tx MXene electrode with anti-freezing property[J]. Journal of Materials Chemistry A,2021,9:25073-25085.

Peng, Junbo.,Zhou, Manhua.,Gao, Yafei.,Wang, Jianfeng.,Cao, Yanxia.,...&Yang, Yanyu.(2021).A mechanically robust all-solid-state supercapacitor based on a highly conductive double-network hydrogel electrolyte and Ti3C2Tx MXene electrode with anti-freezing property.Journal of Materials Chemistry A,9,25073-25085.

Peng, Junbo,et al."A mechanically robust all-solid-state supercapacitor based on a highly conductive double-network hydrogel electrolyte and Ti3C2Tx MXene electrode with anti-freezing property".Journal of Materials Chemistry A 9(2021):25073-25085.