SOLAR ENERGY
·
2022
·
IF 7.188
Kai Sheng,Mahmoud A. Khalifa,Zitao Wang,Jianming Zheng,Chunye Xu
Developing a low-cost and efficient Photovoltachromic Device (PVCD) can address the requirements of energy-harvesting smart windows . In this work, low-cost poly(3,4-(2,2-dimethylpropylenedioxy)thiophene) (PProDOT-Me 2 ) is presented for replacing expensive Pt and achieving a WO 3 -based PVCD with rapid bleaching speed. The device consists of the proposed WO 3 /PProDOT-Me 2 electrode, an electrolyte containing I − /I 3 − redox couple , and dye-sensitized TiO 2 photoanode. The PVCD changes state between colored and bleached by simply altering the open and short circuit of the device. The PVCD achieves high optical contrast of 45.1% at 680 nm with a fast bleaching time of 15.5 s, coloring time of 3.6 s, and cycling stability over 200 cycles. These unique characteristics result from the PProDOT-Me 2 could help accelerate the electrochromic process of WO 3 and fast transferring charges to the electrolyte that enhances photovoltaic performance . The accelerating mechanism is analyzed and the related experimental evaluations are executed. This study reveals promising prospects of the proposed WO 3 -PProDOT-Me 2 electrode for low-cost PVCD.
研究领域:
材料科学
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能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Chuang Sun,Xinlei Shi,Yabo Zhang,Jiajie Liang,Jie Qu,Chao Lai
Lithium-iodine (Li-I2) batteries are promising candidates for next-generation electrochemical energy storage systems due to their high energy density and the excellent kinetic rates of I2 cathodes. However, dissolution of iodine and iodide has hindered their widespread adoption for practical applications. Herein, a Ti3C2Tx MXene foam with a three-dimensional hierarchical porous architecture is proposed as a cathode-electrolyte interface layer in Li-I2 batteries, enabling high-rate and ultrastable cycling performance at a high iodine content and loading mass. Theoretical calculations and empirical characterizations indicate that Ti3C2Tx MXene sheets with high metallic conductivity not only provide strong chemical binding with iodine species to suppress the shuttle effect but also facilitate fast redox reactions during cell cycling. As a result, the Li-I2 battery using a cathode with 70 wt % I2 cycled stably for over 1000 cycles at a rate of 2 C, even at an ultrahigh loading mass of 5.2 mg cm–2. To the best of the authors’ knowledge, this is the highest reported loading at such a high iodine content. This work suggests that using a Ti3C2Tx MXene interface layer can enable the design and application of high-energy Li-I2 batteries.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 28
·期 6
·2865-2873
·
IF 2.961
Zhi Guowei,Wang Wei,Yang Lu,Sun Luanhong,Hao Lingyun,Tang Zhengxia,Lin Qing,Yao Hanyu
Due to high theoretical capacity and low cost of CuSbS 2 , it is deemed to be one of the most promising anode materials for lithium-ion batteries (LIBs). In this paper, the effects of different Cu/Sb ratios on the properties of composites prepared by one-step microwave irradiation method were studied. The results showed the increasement of Cu element could improve conductivity of anode material and the structure stability to reduce the capacity loss. And increasing composition of Cu element also could improve the initial columbic efficiency. The best initial discharge capacity was as high as 3001.9 mA hg −1 , and even the specific capacity still kept 215.8 mA hg −1 after 120 cycles, which was got at 1:3 of Cu/Sb ratio. This work provides a method for the Cu/Sb ratio effect of the performance for the LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2021
·
IF 7.053
C.H. Wang,L. Huang,Y. Zhong,X.L. Tong,C.D. Gu,X.H. Xia,Lingjie Zhang,X.L. Wang,J.P. Tu
High-performance lithium ion batteries (LIBs) with high energy/power density are always the persistent pursuit of people. High-quality anode is the key point for the performance improvement of LIBs. In this work, a facile combined strategy is proposed to construct integrated TNO/AOSC electrode, in which Aspergillus Oryzae Spore Carbon (AOSC) conductive matrix is employed to hold Ti 2 Nb 10 O 29 (TNO) nanoparticles . The TNO/AOSC not only shortens electron/ion transfer pathway on account of the nanostructure of TNO, but also provides better chemical stability from AOSC skeleton. Accordingly, the preeminent rate capacity (135.2 mA h g −1 at 10C) and relatively superior cycle stability (a capacity of 149.8 mA h g −1 after 200 cycles at 1C) are obtained for the TNO/AOSC, much better than TNO counterpart. The superior performance of the TNO/AOSC can be ascribed to the beneficial synergistic factors on enhanced electronic conductivity and solider structure from AOSC substrate. This intriguing design strategy may trigger interest for design of other high-quality electrodes in LIBs.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jing Sun,Xiaowei Li,Yuhong Huang,Guiling Luo,Duanjian Tao,Jiangtao Yu,Linlin Chen,Yanhong Chao,Wenshuai Zhu
Extraction of lithium from liquid lithium resources has become a popular research field, among which H 2 TiO 3 material has great application potential. In this work, we further explored the correlation that the hydrophilicity of H 2 TiO 3 with its adsorption performance based on the existing work. The double surfactants method was used to regulate the morphology and hydrophilic functional groups of the surface to regulate the material hydrophilia and prepare nano-sized lithium ion sieve. The effect of surfactant and preparation method on the hydrophilicity and adsorption properties of the materials were investigated. The results show that the synthesized lithium ion sieve H 2 TiO 3 -4 (HTO-4) has excellent hydrophilicity and adsorption performance reflected with the maximum adsorption capacity of 56.03 mg·g −1 . Meanwhile, the adsorption capacity loss of the material is only 3.8 % after five cycles, which shows a satisfactory cyclic stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Li Rao,Zhou Zhou,Huibin Liu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Hypothesis Na 5 V 12 O 32 (NVO) is a potential cathode for aqueous zinc ion batteries (AZIBs). However, it suffers severe capacity decay due to the dissolution of the active material. The structural design may be an effective solution to the problem. Experiments Herein, we construct a typical two-dimensional hierarchical structure of Na 5 V 12 O 32 @graphene (NVO@G) via a facile molten salt method. Findings The capacity fading problem is solved by the in-situ conversion of NVO@G to a more stable hierarchical system during cycling. The in-situ formed zinc pyrovanadate (Zn 3 V 2 O 7 (OH) 2 ·2H 2 O, ZVO) nanosheets on the surface of graphene exhibits excellent zinc-ion storage stability. The presence of graphene induces the growth of NVO nanobelts to construct the typical two-dimensional hierarchical structure. Additionally, the in-situ conversion makes the formed ZVO nanosheets contact with graphene better. Benefitting from the hierarchical nanostructure and in-situ phase conversion, the NVO@G electrode shows excellent long-term stability (96.4% retention after 340 cycles at 0.3 A g −1 , 85.7% retention after 4400 cycles at 5 A g −1 ) and high zinc ion storage capacity (220 mAh g −1 at 0.3 A g −1 ), which is superior to those of most electrode materials previously reported.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianbo Wan,Ruiqing Wu,Yiyi Chen,Hao Zhang,Huafeng Li,Bohai Wang,Tomasz Liskiewicz,Shengwei Shi
MXenes show great potential in energy storage due to their excellent conductivity, abundant surface groups and adjustable interlayer spacing. Amino modification is an effective strategy to improve electrochemical properties of MXene. However, the selection of amino source is still a key issue. Herein, the amino modification of Ti 3 C 2 MXenes for high-performance supercapacitors has been investigated. The structure and electrochemical properties of Ti 3 C 2 are modified by different amino sources, such as ethylenediamine (EDA), monoethanolamine (MEA) and hydrazine monohydrate (HM). EDA ensures Ti 3 C 2 the largest interlayer spacing (13.96 Å) and highest specific surface area (52.2 m 2 g −1 ). In addition, there are more functional groups in EDA-modified Ti 3 C 2 (EDA-Ti 3 C 2 ) resulted from the stronger electron-donating nature of EDA than HM and MEA. Thus, EDA-Ti 3 C 2 exhibits the largest specific capacitance of 683 F g −1 in 1 M H 2 SO 4 electrolyte at 2 mV/s, and the capacitance maintains 97.3 % of the original after 10,000 cycles at 50 mV/s. As a comparison, MEA-Ti 3 C 2 and HM-Ti 3 C 2 show specific capacitances of 553 F g −1 and 470 F g −1 , respectively. Furthermore, the symmetric supercapacitor based on EDA-Ti 3 C 2 electrode achieves maximum energy density of 7.87 W h kg −1 at power density of 600 W Kg −1 , and the energy density still remains at 6.34 W h Kg −1 even at an increased power density of 3000 W Kg −1 . This study proposes a simple strategy to enhance electrochemical properties of MXene by amino modification, providing valuable insights for high-performance supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuzhu Shi,Juanqin Xue,Yongqi Yu,Guangdong Wu,Changbin Tang
For the purpose of making high-value use of Chinese medicine waste, the preparation of derived biochar was studied and used as an electrode for supercapacitors (SCs). High-temperature KOH activation was used to convert the seed shells of discarded traditional Chinese medicine (Mubiezi) into graded porous carbon electrode materials, and the optimal electrode (MCSSAC-3) was obtained by optimizing the KOH addition ratio in this work. The MCSSAC-3 electrode obtained has a high specific surface area (1288.55 m2 g–1) and significantly higher specific capacitance of 302.29 F g–1 at 0.5 A g–1. The MCSSAC-3//MCSSAC-3 symmetric device has a high energy density of 11.13 Wh kg–1 at a power density of 350 W kg–1. In addition, even after 10,000 consecutive cycles, the MCSSAC-3//MCSSAC-3 symmetric device exhibits ideal capacitance retention of 87.16% at 10 A g–1. This work offers an approach for the preparation of low-cost and high-performance SCs carbon-based electrodes from discarded traditional Chinese medicine.
研究领域:
材料科学
·
环境科学
·
中医药学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 14
·e202300655
·
IF 2.2
Lingmei Zhang,Qian Zhao,Chao Feng,Guoning Zhang,Yucheng Wang,Yan Li,Wenjuan Sun,Hong Zhao
Graphical A cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n (SEU-1) has been successfully constructed and comprehensively characterized. The maximum specific capacitance of SEU-1 is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution, suggesting SEU-1 can be applied to high performance SC. Two-dimensional (2D) metal–organic frameworks (MOFs) have been a worldwide research interest due to their potential application in supercapacitors. Herein, a cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n , namely, SEU-1 ; H 2 ppza=3-(pyridin-4-yl)-1 H -pyrazole-5-carboxylic acid) has been synthesized via a one-step solvothermal method. Single X-ray diffraction analysis shows that the SEU-1 exhibits a (3,3,4)-connected 2D structure with a Schläfli symbol of (6 2 ⋅ 8)(6 3 )(6 4 ⋅ 8 ⋅ 10). Variable-temperature magnetic susceptibility data display that antiferromagnetic interactions between two Co II ions exist in SEU-1 . The supercapacitive performance has been evaluated in the three-electrode system. Its maximum specific capacitance is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution. These results demonstrate that SEU-1 is a good candidate for electrode material for electrochemical energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wenyu Bai,Guangpeng Ma,Xinpu Zhou,Tongtong Gao,Yu Luo,Di Yu,Shuang Wang
Traditional two-dimensional transition metal carbides/nitrides (MXene) have gained much academic concern due to their excellent physicochemical properties, but their susceptibility to self-stacking leads to poor cyclic stability. In this paper, an MXene-based electrode active material was successfully prepared. The generated modified PPy (g-PPy) increases the active site, increases the accessibility of ions, and can give full play to the pseudocapacitance. By the combination of modified PPy (g-PPy) nanoparticles with pseudocapacitive behavior polymerized in situ on sulfonated cellulose (SC) and MXene , not only the electrochemical performance was improved by exploiting the synergy between different electrode materials and different energy storage mechanisms, but also the MXene as a skeleton limited the volume expansion and contraction of PPy during charge/discharge cycles and the g-PPy and SC composites (g-PPy@SC) as a spacer supported the MXene layer, resulting in much higher cycle stability. Cycle stability of 98.4 % even after 10,000 cycle tests. In addition, a symmetric supercapacitor assembled from this electrode material maintains a stability of 84.4 % under 10,000 cycles at a low temperature of −40 °C. Therefore, this study provides a feasible method for the preparation of MXene-based electrodes with high cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Yifan Gao,Yanmei Zhang,Haili Huang,Chengwei Deng,Yuanhui Cheng
Converting coal-coke into high-value carbon materials is an effective avenue to realize resource high-value utilization. Here, we employ a two-step method to convert coal-coke into capacitive carbon. Coal-coke is first pretreated with mixed acid of hydrochloric acid and nitric acid and then chemically activated by potassium hydroxide at a high temperature. Prepared coal-carbon has a high specific surface area of 1633 m 2 /g and plenty of oxygen and nitrogen dopants, which are beneficial for electric double-layer and Faradic processes, respectively. Coal-carbon exhibits a high specific capacitance of 237 F/g, twice as high as commercial active carbons. Moreover, it delivers a capacitive retention rate of 92 % after running 3000 cycles. This good electrochemical performance suggests that coal-coke-derived porous carbon can replace commercial active carbons as a low-cost candidate for supercapacitors. This work proposes a feasible way to utilize coal-coke with high value and provide low-cost materials to supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2021
·
IF 6.617
Yingjuan Sun,Jiefeng Zheng,Yang Yang,Jianhao Zhao,Jianhua Rong,Hongyan Li,Li Niu
We reports an all-conductive polymers composite with cross-linking network structures composed of porous polyaniline (PANi) and PEDOT:PSS. This composite with unique structures and morphological properties has the ability to be utilized as cathode for sodium ion batteries (SIBs). Specifically, the cathode delivers a high reversible capacity of 81.9 mA h g −1 at a current density of 100 mA g −1 and represents outstanding cycle stability. Remarkably, the PANi-PEDOT cathode exhibits a high performance compared with state of the art performance of cathode materials for SIBs, for instance, Na 2 Fe 2 (SO 4 ) 3 , Na 0·6 Cr 0·6 Ti 0·4 O 2 and Na 2 MnP 2 O 7 . Moreover, the kinetics analysis of cyclic voltammetry represents predominant capacitive process, which plays dominant roles in charge storage. These conductive cross-linking networks structures and high stability endow the cathode good electrical conductivity and play important roles in the cycling stability of the Na ion cathode, thus promoting the electrochemical performances of the cathode, offering a great promise in SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）