Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte
The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE has developed a reputation due to low ionic conductivity endowed by its high crystallinity and poor water retention capacity. In this work, de...
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Published in | ACS applied materials & interfaces Vol. 13; no. 8; pp. 9856 - 9864 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
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United States
American Chemical Society
03.03.2021
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Abstract | The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE has developed a reputation due to low ionic conductivity endowed by its high crystallinity and poor water retention capacity. In this work, density functional theory (DFT) calculations first revealed that the high crystallinity of PVA can be greatly disrupted by forming hydrogen bonds with natural agarose macromolecules. The hydrogen bond interpenetrated three-dimensional agarose/PVA network offers high water retention and large amounts of channels for movement of Li+ on hydroxyl oxygen atoms. So, an optimized formation of the Li–O coordinate bond (g Li–O(r) = 8.78) and improved diffusion coefficient of Li+ (D Li+ ) (71 × 10–6 cm2 s–1) were obtained in the agarose/PVA model. When assembled into SSCs, agarose/PVA-GPE with 2 M LiOAc (AP-GPE) exhibits an outstanding specific capacitance (697.22 mF cm–2 at 5 mA cm–2). The high water retention of agarose and large amounts of −OH groups in the agarose macromolecular can generate H2O by dehydration reaction, reducing the flammability of PVA and greatly enhancing the safety of SSCs. |
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AbstractList | The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE has developed a reputation due to low ionic conductivity endowed by its high crystallinity and poor water retention capacity. In this work, density functional theory (DFT) calculations first revealed that the high crystallinity of PVA can be greatly disrupted by forming hydrogen bonds with natural agarose macromolecules. The hydrogen bond interpenetrated three-dimensional agarose/PVA network offers high water retention and large amounts of channels for movement of Li+ on hydroxyl oxygen atoms. So, an optimized formation of the Li–O coordinate bond (g Li–O(r) = 8.78) and improved diffusion coefficient of Li+ (D Li+ ) (71 × 10–6 cm2 s–1) were obtained in the agarose/PVA model. When assembled into SSCs, agarose/PVA-GPE with 2 M LiOAc (AP-GPE) exhibits an outstanding specific capacitance (697.22 mF cm–2 at 5 mA cm–2). The high water retention of agarose and large amounts of −OH groups in the agarose macromolecular can generate H2O by dehydration reaction, reducing the flammability of PVA and greatly enhancing the safety of SSCs. The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE has developed a reputation due to low ionic conductivity endowed by its high crystallinity and poor water retention capacity. In this work, density functional theory (DFT) calculations first revealed that the high crystallinity of PVA can be greatly disrupted by forming hydrogen bonds with natural agarose macromolecules. The hydrogen bond interpenetrated three-dimensional agarose/PVA network offers high water retention and large amounts of channels for movement of Li on hydroxyl oxygen atoms. So, an optimized formation of the Li-O coordinate bond ( (r) = 8.78) and improved diffusion coefficient of Li ( ) (71 × 10 cm s ) were obtained in the agarose/PVA model. When assembled into SSCs, agarose/PVA-GPE with 2 M LiOAc (AP-GPE) exhibits an outstanding specific capacitance (697.22 mF cm at 5 mA cm ). The high water retention of agarose and large amounts of -OH groups in the agarose macromolecular can generate H O by dehydration reaction, reducing the flammability of PVA and greatly enhancing the safety of SSCs. |
Author | Yan, Tingting Guo, Xiangxin Li, Daohao Zou, Yihui Zhang, Xiaohui Yang, Dongjiang |
AuthorAffiliation | Shandong Qingdao University Queensland Micro-and Nanotechnology Centre (QMNC) Griffith University College of Materials Science and Engineering, School of Environmental Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles |
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Author_xml | – sequence: 1 givenname: Tingting surname: Yan fullname: Yan, Tingting organization: Shandong Qingdao University – sequence: 2 givenname: Yihui surname: Zou fullname: Zou, Yihui organization: Shandong Qingdao University – sequence: 3 givenname: Xiaohui surname: Zhang fullname: Zhang, Xiaohui organization: Shandong Qingdao University – sequence: 4 givenname: Daohao surname: Li fullname: Li, Daohao organization: Shandong Qingdao University – sequence: 5 givenname: Xiangxin surname: Guo fullname: Guo, Xiangxin organization: Shandong Qingdao University – sequence: 6 givenname: Dongjiang orcidid: 0000-0002-9365-3726 surname: Yang fullname: Yang, Dongjiang email: d.yang@qdu.edu.cn organization: Griffith University |
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Snippet | The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE... The gel polymer electrolyte (GPE) is the key to assembling high-performance solid-state supercapacitors (SSCs). The commercial poly(vinyl alcohol) (PVA) GPE... |
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Title | Hydrogen Bond Interpenetrated Agarose/PVA Network: A Highly Ionic Conductive and Flame-Retardant Gel Polymer Electrolyte |
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