CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2021
·
IF 1.134
Yan-Yan LI,Yu-Xi YANG,Sha-Sha HONG,Yao LIU,Zhi YANG,Bin-Yu ZHAO,Jian-Po SU,Li WANG
A novel redox-active Schiff base polymer (SBP PPDA-PDA ) was prepared by condensation of p -phenylenediamine with 1,10-phenanthroline-2,9-dicarbaldehyde. The structure of SBP PPDA-PDA was investigated by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, N 2 adsorption/desorption isotherm, and powder X-ray diffraction and electrochemical techniques. The results showed that SBP PPDA-PDA had two-dimensional lamellar structure. The electrochemical properties of SBP PPDA-PDA were characterized by cyclic voltammetry, showing several pairs of redox peaks and good catalytic ability toward oxygen reduction. On the basis of the redox-active activity of SBP PPDA-PDA , an electrochemical pH sensor was proposed based on SBP PPDA-PDA with a linear range from 2 to 9 for pH detection. With nitrogen-containing skeleton and porous structure, SBP PPDA-PDA could be used as support to load glucose oxidase (GOD). Thus, a novel ratiometric electrochemical glucose sensor was further constructed by immobilizing GOD on SBP PPDA-PDA modified electrode. The results revealed that the reduction peak of O 2 decreased with the gradual addition of glucose, while the response peak of SBP PPDA-PDA at about 0.15 V almost remained. The sensor based on GOD/SBP PPDA-PDA /SPE showed a rapid response, a linear range from 22.5 μmol/L–5 mmol/L and a lower detection limit of 7.56 μmol/L for glucose.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2023
·
IF 2.5
Ma Yukun,Zhao Hui,Shu Ronglu,Zhang Cunshe,Wang Wei
Supercapattery has drawn attention due to its superior tip-discharge efficiency and high energy density without affecting the cycle stability compared to conventional batteries and supercapacitors (SCs). Redox-active porous organic polymers (POPs) are regarded as promising energy storage materials due to the presence of overlapped π-electron clouds between the stacked layers, conjugated backbone, and high-rate charge transfer channels. However, single POPs material has fewer electroactive sites resulting from the broad and ordered π-π stacking in the network structure, limiting their corresponding electrochemical performance. In the present paper, Schiff base polymers containing ferrocene (Fc) and carbon nanotubes (CNTs) were prepared by one pot synthesis method for high-performance supercapattery. The microstructure studies exhibit that the CNTs were combined with the amorphous Schiff base polymer backbone. Moreover, the charge storage mechanism was discussed in detail. The electrochemical properties studies present that the sample (SPOP-Fc 0.4 /CNTs-5) possess the maximal specific capacitance (201.3 mAh g −1 ) at 0.5 A g −1 and the excellent specific capacity retention (retaining 84.3% of initial capacitance after 5000 GCD cycles at the current density of 10 A g −1 ). The enhanced performance shown by SPOP-Fc 0.4 /CNTs-5 was attributed to the synergy produced by the redox behavior and conjugated backbone provided by SPOP, the doping of Fc, and high-speed ion transport channels provided by CNTs. To evaluate the practicability of electrode materials, the asymmetric supercapattery devices (ASC) were assembled in a configuration of the SPOP-Fc 0.4 /CNTs-5//activated carbon (AC). SPOP-Fc 0.4 /CNTs-5//AC delivered a superb energy density of 65.9 Wh kg −1 with a power density of 344.8 W kg −1 while remaining almost 73.6% of the specific capacitance even after 5000 continuous GCD cycles. These Schiff-based POPs with advanced electrochemical capabilities deliver a fresh solution for material selection in energy storage, present extensively apply prospects in energy storage field.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
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IF 4.798
Haijun Ye,Fangqing Jiang,Hongqin Li,Zheng Xu,Jiao Yin,Hui Zhu
The redox-active organic compounds show great potentials as anodes for high energy density Li-ion batteries (LIBs), comparing with the traditional transition metal-based inorganic compounds. However, the inevitable dissolution behaviors of these organics in organic electrolyte will arouse the recession in their cycling stabilities. To circumvent this problem, we successfully applied an electrochemically active imine group to connect the carbonyl compound to form conjugated polymer, where the occurrence of multi-electron reactions suppressed the dissolution of anthraquinone in the organic electrolyte with improved cycling stability and high capacity for LIBs. In detail, by virtue of a facile solid-phase reaction between 1, 4-diaminoanthraquinone (14DAAQ) and p-phthalaldehyde (PPD), a highly conjugated polymeric Schiff base (PSB) was synthesized. The obtained PSB exhibited a reversible specific capacity of 175 mAh g −1 at a current density of 10 mA g −1 . In addition, after 100 cycles, a cycling stability with 90% capacity retention can be maintained, manifesting a promising application of the organic material in high performance anodes for LIBs.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 6
·2639-2647
·
IF 2.817
Guo Yufei,Su Jianpo,Yang Han,Gu Fengling,Song Yonghai,Zhu Yongmei
Here, a flexible electrode based on three-dimensional melamine foam-derived macroporous carbon (3D-FC) loading graphene oxide (GO), Schiff base polymer (SPB) foam-derived carbon (CNDS), and polyaniline (PANI) arrays are employed for supercapacitors. The commercial melamine foam is prepared into ultralight and flexible 3D-FC by high-temperature carbonization, and then the GO is uniformly distributed into 3D-FC to form 3D-FC/GO, which avoid the aggregation of GO. The SPB foam is grown on 3D-FC/GO and subsequently is transformed into CNDS by carbonization for loading PANI. The uniformly distributed GO connected the fibers of 3D-FC to improve the electrical conductivity. The macropores of 3D-FC/GO/CNDS/PANI enhance the mass transfer. The PANI is vertically arrayed on 3D-FC/GO/CNDS to form flexible 3D-FC/GO/CNDS/PANI. The as-prepared 3D-FC/GO/CNDS/PANI as electrode materials exhibits a rapid electron transport and good performance with a specific capacitance of 2814.5 F g −1 at the current density of 0.5 A g −1 .
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2021
·
IF 9.127
Mingyue Tan,Yingying Xiao,Wenhao Xi,Xiufang Lin,Bifen Gao,Yilin Chen,Yun Zheng,Bizhou Lin
Designing transition metal and nitrogen co-doped carbon as efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) bifunctional electrocatalysts is pivotal for rechargeable zinc-air batteries. Herein, a triazine-containing poly(Schiff-base) has been synthesized and used as the nitrogen-rich precursor to prepare Co/Co 2 N modified nitrogen-doped porous carbon (Co@NC). The formed cobalt nanoparticles are impregnated in the porous carbon matrix with an intermediary layer of catalytically active Co 2 N. Co@NC exhibits a specific surface area of 2513 m 2 g −1 and remarkable bifunctional catalytic activities with a low gap of 0.76 V between ORR and OER overpotentials. The Co@NC-based battery possesses a peak power density of 141.6 mW cm −2 , a specific capacity of 776 mAh g −1 and superior long-term cycling stability, stemmed from the unique impregnated structure with sufficient accessible active sites.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）