Stretchable fiber-shaped asymmetric supercapacitors with ultrahigh energy density

Abstract Fiber-shaped asymmetric supercapacitors (FASCs) have attracted considerable attention due to their potential application in portable and wearable electronics. Although high stretchability have been achieved in fiber-shaped supercapacitors, low energy density severely restricts their practical applications. This study develops a simple and cost-effective method to synthesize highly capacitive hierarchically-structured MnO2@PEDOT:PSS@oxidized carbon nanotube fibers (MnO2@PEDOT:PSS@OCNTF) positive electrode and flower-like MoS2 nanosheets@CNTF (MoS2@CNTF) negative electrode. Their intriguing structural features allowed us to successfully fabricate a prototype stretchable FASC with a maximum operating voltage of 1.8 V. Due to the synergy of the MnO2@PEDOT:PSS@OCNTF and MoS2@CNTF, the optimized stretchable FASC device exhibits a remarkable specific capacitance of 278.6 mF/cm2 and a superior energy density of 125.37 μWh/cm2, which are higher than those of any reported state-of-the-art fiber-shaped supercapacitors. In addition, the device possesses outstanding stretchability, as it maintains a capacitance retention of 92% after stretching at a strain of 100% for 3000 cycles. These stretchable FASCs have great potential as power sources for next-generation portable and wearable electronics.

[1]  Huisheng Peng,et al.  A highly stretchable, fiber-shaped supercapacitor. , 2013, Angewandte Chemie.

[2]  Chao Gao,et al.  Graphene fiber-based asymmetric micro-supercapacitors , 2014 .

[3]  Q. Wang,et al.  A high energy density all-solid-state asymmetric supercapacitor based on MoS2/graphene nanosheets and MnO2/graphene hybrid electrodes , 2016 .

[4]  Zhong Lin Wang,et al.  Fiber supercapacitors made of nanowire-fiber hybrid structures for wearable/flexible energy storage. , 2011, Angewandte Chemie.

[5]  Zhiyong Fan,et al.  Constructing optimized wire electrodes for fiber supercapacitors , 2014 .

[6]  Xiaojuan Hou,et al.  Flexible coaxial-type fiber supercapacitor based on NiCo2O4 nanosheets electrodes , 2014 .

[7]  Jun Wei,et al.  Emergence of fiber supercapacitors. , 2015, Chemical Society reviews.

[8]  Zhong Lin Wang,et al.  Rationally designed graphene-nanotube 3D architectures with a seamless nodal junction for efficient energy conversion and storage , 2015, Science Advances.

[9]  Zhibin Yang,et al.  Core‐Sheath Carbon Nanostructured Fibers for Efficient Wire‐Shaped Dye‐Sensitized Solar Cells , 2014, Advanced materials.

[10]  Hao Sun,et al.  Aligned carbon nanotube/molybdenum disulfide hybrids for effective fibrous supercapacitors and lithium ion batteries , 2015 .

[11]  Ning Liu,et al.  Design of a Hierarchical Ternary Hybrid for a Fiber-Shaped Asymmetric Supercapacitor with High Volumetric Energy Density , 2016 .

[12]  Lei Zhai,et al.  Coil-Type Asymmetric Supercapacitor Electrical Cables. , 2015, Small.

[13]  Peng Chen,et al.  Hybrid fibers made of molybdenum disulfide, reduced graphene oxide, and multi-walled carbon nanotubes for solid-state, flexible, asymmetric supercapacitors. , 2015, Angewandte Chemie.

[14]  L. Qu,et al.  All‐Graphene Core‐Sheath Microfibers for All‐Solid‐State, Stretchable Fibriform Supercapacitors and Wearable Electronic Textiles , 2013, Advanced materials.

[15]  Dingshan Yu,et al.  Scalable synthesis of hierarchically structured carbon nanotube–graphene fibres for capacitive energy storage , 2014, Nature Nanotechnology.

[16]  Fei Xiao,et al.  Hierarchically structured MnO2/graphene/carbon fiber and porous graphene hydrogel wrapped copper wire for fiber-based flexible all-solid-state asymmetric supercapacitors , 2015, Journal of Materials Chemistry A.

[17]  Haitao Huang,et al.  High-performance fiber-shaped supercapacitors using carbon fiber thread (CFT)@polyanilne and functionalized CFT electrodes for wearable/stretchable electronics , 2015 .

[18]  Tao Chen,et al.  High-performance, stretchable, wire-shaped supercapacitors. , 2014, Angewandte Chemie.

[19]  Haifeng Cheng,et al.  Stretchable Fiber Supercapacitors with High Volumetric Performance Based on Buckled MnO2 /Oxidized Carbon Nanotube Fiber Electrodes. , 2017, Small.

[20]  Changsoon Choi,et al.  Twistable and Stretchable Sandwich Structured Fiber for Wearable Sensors and Supercapacitors. , 2016, Nano letters.

[21]  Y. Gogotsi,et al.  MoS2 Nanosheets Vertically Aligned on Carbon Paper: A Freestanding Electrode for Highly Reversible Sodium‐Ion Batteries , 2016 .

[22]  Chen Chen,et al.  Twisting Carbon Nanotube Fibers for Both Wire‐Shaped Micro‐Supercapacitor and Micro‐Battery , 2013, Advanced materials.

[23]  Tao Chen,et al.  Highly Stretchable Supercapacitors Based on Aligned Carbon Nanotube/Molybdenum Disulfide Composites. , 2016, Angewandte Chemie.

[24]  Weiguo Hu,et al.  Wearable Self‐Charging Power Textile Based on Flexible Yarn Supercapacitors and Fabric Nanogenerators , 2016, Advanced materials.

[25]  Ping Xu,et al.  Carbon Nanotube Fiber Based Stretchable Wire‐Shaped Supercapacitors , 2014 .

[26]  Zhibin Yang,et al.  Recent advancement of nanostructured carbon for energy applications. , 2015, Chemical reviews.

[27]  Xin Cai,et al.  Fiber Supercapacitors Utilizing Pen Ink for Flexible/Wearable Energy Storage , 2012, Advanced materials.

[28]  Bin Wang,et al.  Fiber-shaped solid-state supercapacitors based on molybdenum disulfide nanosheets for a self-powered photodetecting system , 2016 .

[29]  Wenjie Mai,et al.  Facile synthesis of TiO2/Mn3O4 hierarchical structures for fiber-shaped flexible asymmetric supercapacitors with ultrahigh stability and tailorable performance , 2017 .

[30]  Huisheng Peng,et al.  Flexible and Weaveable Capacitor Wire Based on a Carbon Nanocomposite Fiber , 2013, Advanced materials.

[31]  F. Kang,et al.  Engineering of MnO2-based nanocomposites for high-performance supercapacitors , 2015 .

[32]  G. Wallace,et al.  Hybrid nanomembranes for high power and high energy density supercapacitors and their yarn application. , 2012, ACS nano.

[33]  Jie Liu,et al.  A single wire as all-inclusive fully functional supercapacitor , 2017 .

[34]  Huisheng Peng,et al.  Superelastic Supercapacitors with High Performances during Stretching , 2015, Advanced materials.

[35]  Jian Chang,et al.  Coaxial fiber supercapacitor using all-carbon material electrodes. , 2013, ACS nano.

[36]  Xiaoxiao Liu,et al.  Flexible fiber-shaped supercapacitors based on hierarchically nanostructured composite electrodes , 2015, Nano Research.

[37]  Jianli Cheng,et al.  A Fiber Supercapacitor with High Energy Density Based on Hollow Graphene/Conducting Polymer Fiber Electrode , 2016, Advanced materials.

[38]  Hui Meng,et al.  Rational design of carbon shell endows TiN@C nanotube based fiber supercapacitors with significantly enhanced mechanical stability and electrochemical performance , 2017 .

[39]  Wei Zhang,et al.  High‐Performance Fiber‐Shaped All‐Solid‐State Asymmetric Supercapacitors Based on Ultrathin MnO2 Nanosheet/Carbon Fiber Cathodes for Wearable Electronics , 2016 .

[40]  Byung-Sun Kim,et al.  Stretchable Wire-Shaped Asymmetric Supercapacitors Based on Pristine and MnO2 Coated Carbon Nanotube Fibers. , 2015, ACS nano.

[41]  Chao Gao,et al.  Coaxial wet-spun yarn supercapacitors for high-energy density and safe wearable electronics , 2014, Nature Communications.

[42]  Zhenghui Pan,et al.  Ultra-endurance flexible all-solid-state asymmetric supercapacitors based on three-dimensionally coated MnOx nanosheets on nanoporous current collectors , 2016 .