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A self-healable and highly flexible supercapacitor integrated by dynamically cross-linked electro-conductive hydrogels based on nanocellulose-templated carbon nanotubes embedded in a viscoelastic polymer network
Open accessAbstract
Abstract Recent development of flexible and self-healable electro-conductive hydrogels (ECHs) are considered as promising soft materials towards intelligent applications. Nonetheless, realizing the integrated features of high electro-conductivity, viscoelasticity and mechanical toughness, as well as inherent mouldability, fast self-healing ability, and ideal electrochemical properties is still challenging. Herein, we report a kind of multifunctional ECHs based on a polyvinyl alcohol-borax (PVAB) hydrogel and carbon nanotube-cellulose nanofiber (CNT-CNF) nanohybrids that combines the conductivity of CNTs and template function of CNFs. CNFs serve as dispersant to uniformly stabilize CNTs in suspension. As-prepared CNT-CNF nanohybrids are uniformly dispersed into PVAB to construct freeze-standing CNT-CNF/PVAB composite hydrogels. Owing to a conductive and reinforcing dual-network structure, the compression stress (∼93 kPa) and storage modulus (∼7.12 kPa) of CNT-CNF/PVAB are 2.7 and 1.9-fold larger than those of CNF/PVAB. CNT-CNF/PVAB also exhibits low density (∼1.1 g cm−3), high water content (∼95%), pH sensitivity, intrinsic mouldability and 20s self-healing capability. The solid-state supercapacitor assembled by PVAB-based hydrogels has a specific capacitance of 117.1 F g−1 and a capacitance retention of 96.4% after 1000 cycles. The self-healable and flexible supercapacitor demonstrates an ideal capacitance retention (∼98.2%) after ten damaging/self-healing cycles and a capacitance retention (∼95%) after 1000 cycles under various deformation.
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Cites
Self-Assembled Graphene Hydrogel via a One-Step Hydrothermal Process
Xu, Y., Sheng, K., Li, C., & Shi, G. (2010) · ACS Nano · doi:10.1021/nn101187z · Cited by 3,251
Han, L., Yan, L., Wang, M., Wang, K., Fang, L., Zhou, J., Fang, J., Ren, F., & Lu, X. (2018) · Chemistry of Materials · doi:10.1021/acs.chemmater.8b01446 · Cited by 438
Cited by
Two-birds-one-stone: multifunctional supercapacitors beyond traditional energy storage
Zhou, Y., Qi, H., Yang, J., Bo, Z., Huang, F., Islam, M. S., Lu, X., Dai, L., Amal, R., Wang, C. H., et al. (2021) · Energy & Environmental Science · doi:10.1039/d0ee03167d · Cited by 470
Qin, Y., Mo, J., Liu, Y., Zhang, S., Wang, J., Fu, Q., Wang, S., & Nie, S. (2022) · Advanced Functional Materials · doi:10.1002/adfm.202201846 · Cited by 382
Bio-inspired hydrogels with fibrous structure: a review on design and biomedical applications
Chen, Y., Hao, Y., Mensah, A., Lv, P., & Wei, Q. (2022) · Biomaterials Advances · doi:10.1016/j.bioadv.2022.212799 · Cited by 46
Toughened Hydrogels through UV Grafting of Cellulose Nanofibers
Yang, X., Wang, L., Yano, H., & Abe, K. (2021) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.0c08531 · Cited by 16
Metadata
- Authors
- Han, J., Wang, H., Yue, Y., Mei, C., Chen, J., Huang, C., Wu, Q., & Xu, X.
- Venue
- Carbon
- Publisher
- Elsevier BV
- Published
- 2019-08
- Volume
- 149
- Pages
- 1-18
- ISSN
- 0008-6223 (ISSN-L)
- OpenAlex
- W2938745406
- Cited by
- 375
- References
- 2
- FWCI
- 16.47
- Type
- journal article
- Language
- en
- Open access
- green
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- Han, J., Wang, H., Yue, Y., Mei, C., Chen, J., Huang, C., Wu, Q., & Xu, X. (2019). A self-healable and highly flexible supercapacitor integrated by dynamically cross-linked electro-conductive hydrogels based on nanocellulose-templated carbon nanotubes embedded in a viscoelastic polymer network. Carbon. https://doi.org/10.1016/j.carbon.2019.04.029
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