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Hu W, Chen L, Wu X, Du M, Song Y, Wu Z, Zheng Q. Slight Zinc Doping by an Ultrafast Electrodeposition Process Boosts the Cycling Performance of Layered Double Hydroxides for Ultralong-Life-Span Supercapacitors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:38346-38357. [PMID: 34374275 DOI: 10.1021/acsami.1c10386] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Layered double hydroxides (LDHs) have attracted much attention in supercapacitors because of the high specific surface area and theoretical capacitance. However, the bad cycling stability has always been their Achilles' heel that restrains their further application. In this paper, a small amount of unactive and single-valence element zinc, which has no contribution to the capacitance of electrodes, was first doped into NiCo-LDHs through two consecutive electrodeposition processes only within 30 min. With a polyaniline (PANI) nanolayer as the interlayer, an ultrathin NiCoZn-LDH nanoplate network was well-anchored on the carbon cloth surface. The slight Zn2+ doping dramatically enhanced the cycling performance of LDHs with little capacitance decay. Zn2+ doping enhanced the cyclic structural stability of NiCoZn-LDHs, while the PANI layer strengthened the interface interaction between LDHs and the current collector. By controlling the doping content of Zn2+ at 2.9%, the composite electrode achieved the best performance with a high specific capacitance of 1749 F g-1 and an ultralong life span with 89% capacitance retention after 40,000 charge-discharge cycles. This work offers a novel strategy to fast build LDH-based supercapacitors with both high specific capacitance and cycling performance.
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Affiliation(s)
- Wenxuan Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lu Chen
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xing Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Miao Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yihu Song
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ziliang Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Shao B, Zhang X, Guo A, Jiang L, Cui F, Yang X. Eu 3+-doped layered gadolinium hydroxides as drug carriers and their bactericidal behavior. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112213. [PMID: 34225865 DOI: 10.1016/j.msec.2021.112213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/16/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
Layered rare earth hydroxides (LRHs) due to outstanding photoluminescence (PL) properties and anion exchangeability are extensively reported in multiple fields. In this work, the drug-loaded and bactericidal behaviors of Eu3+-doped layered gadolinium hydroxides (LGdHs:Eu) as optical carriers were explored through intercalation and release of cephalexin (CE). In the intercalation state, the PL intensity of CE--LGdHs:Eu obviously decreased because of the quenching effect of CE-. And the PL intensity of LGdHs:Eu was restored with the release of CE- ions in phosphate buffer solutions (PBS). A significant functional relationship between the drug releasing amount and PL intensity ratio was found, providing a novel optical method to specify the drug dosage. And CE--LGdHs:Eu showed the excellent bactericidal properties in both in vivo and in vitro experiments.
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Affiliation(s)
- Baiyi Shao
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, 19-Xinjiekouwai Street, Haidian District, Beijing 100875, China; Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, 104-Youyi Road, Haidian District, Beijing 100094, China
| | - Xiaobao Zhang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, 19-Xinjiekouwai Street, Haidian District, Beijing 100875, China
| | - Aoping Guo
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, 19-Xinjiekouwai Street, Haidian District, Beijing 100875, China
| | - Lu Jiang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, 19-Xinjiekouwai Street, Haidian District, Beijing 100875, China
| | - Fangming Cui
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, 104-Youyi Road, Haidian District, Beijing 100094, China.
| | - Xiaojing Yang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, 19-Xinjiekouwai Street, Haidian District, Beijing 100875, China.
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Korzhneva K, Bekenev V, Khyzhun O, Goloshumova A, Tarasova A, Molokeev M, Isaenko L, Kurus A. Single crystal growth and the electronic structure of Rb2Na(NO3)3: Experiment and theory. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Debbichi M, Alresheedi F. First-principles calculations of mechanical, electronic and optical properties of a new imidooxonitridophosphate. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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