DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Junjie Ding,Wenwen Zhao,Sen Liu,Hui Wang,Qiyu Mu,Zixu Huang,Yi Zhao,Guijing Liu,Ling Wang,Wenlong Xu
One of the effective ways to improve the electrochemical performance of supercapacitors is to fabricate a combined electric double layer capacitor (EDLC)-pseudocapacitance system. In this study, we synthesized the composite material FeCo 2 O 4 @PC by hydrothermal method , which can enhance the electrochemical performance of supercapacitors by the synergetic effect of EDLC and pseudocapacitance mechanisms. A series of physical characterizations including X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) were used to demonstrate the successful compositing of FeCo 2 O 4 @PC. And FeCo 2 O 4 @PC was used for the testing of supercapacitor and the electrochemical performance was evaluated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD). The results show that the composite FeCo 2 O 4 @PC-5 possesses larger specific capacitance and excellent rate capability. This further confirms that the composite of the two materials can overcome their respective shortcomings and improve the overall capacitive performance of the electrode. The composite electrode material FeCo 2 O 4 @PC has great application potential and prospects in the field of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qiyue Chen,Yikang Zhou,Xiaoyun Zhan,Zewen Sun,Qi Zhou,Lili Liu,Lijun Fu,Xinhai Yuan,Yuhui Chen,Xu Liu,Yuping Wu
Solid-state lithium metal batteries (SSLMBs) represent a prime direction for next-generation high-energy-density storage technologies. As the central component for developing SSLMBs, current research focuses on designing solid-state electrolytes featuring high ionic conductivity and low electronic conductivity, along with low cost. However, great challenges are encountered. This work develops a composite solid electrolyte (CSE) consisting of a doped Li4Ti4.95Zr0.05O12 (LTZO1) and poly(vinylidene fluoride) (PVDF), which has a network structure that enables rapid ion conduction and electron blocking. Density functional theory calculations confirm that Zr doping can get a reduced energy barrier for Li+ transport, with ionic conductivity increasing from 0.228 mS cm–1 to 0.665 mS cm–1 and dramatically suppressing its electronic conductivity from 0.11 mS cm–1 to 2.4 × 10–6 S cm–1. The optimized CSE exhibits enhanced ionic conductivity from 0.171 mS cm–1 to 0.581 mS cm–1, further weakens electronic conductivity, and has a critical current density of up to 5.5 mA cm–2. These excellent properties make solid-state batteries such as Li|LTZO1|LiFePO4 and Li|LTZO1|NCM811 achieve good performance, including capacity and cycling. This study provides an effective strategy for preparing practical CSEs for SSLMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 62
·39484-39492
·
IF 3.361
Haiping Lei,Suqin Li,Jiguo Tu
The current aluminum batteries with selenium positive electrodes have been suffering from dramatic capacity loss owing to the dissolution of Se2Cl2 products on the Se positive electrodes in the ionic liquid electrolyte. For addressing this critical issue and achieving better electrochemical performances of rechargeable aluminum–selenium batteries, here a gel-polymer electrolyte which has a stable and strongly integrated electrode/electrolyte interface was adopted. Quite intriguingly, such a gel-polymer electrolyte enables the solid-state aluminum–selenium battery to present a lower self-discharge and obvious discharging platforms. Meanwhile, the discharge capacity of the aluminum–selenium battery with a gel-polymer electrolyte is initially 386 mA h g−1 (267 mA h g−1 in ionic liquid electrolyte), which attenuates to 79 mA h g−1 (32 mA h g−1 in ionic liquid electrolyte) after 100 cycles at a current density of 200 mA g−1. The results suggest that the employment of a gel-polymer electrolyte can provide an effective route to improve the performance of aluminum–selenium batteries in the first few cycles.
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 7
·3453-3460
·
IF 2.961
Chen Fuhua,Guo Hao,Zhao Lili,Chu Ying,Wang Xueying,Zhu Yongping
Traditional cathode materials can no longer meet the development needs of thermal batteries, and the research of new cathode materials is imminent. In this study, WS 2 was successfully prepared by a simple one-step synthesis method. X-ray photoelectron spectroscopy (XPS) showed that it has good electrical conductivity, its bandgap had been calculated by ultraviolet–visible diffuse reflectance spectroscopy (UV-visDRS), and its thermal decomposition temperature exceeded 1000 °C by thermogravimetric (TG) analysis. Due to the high decomposition temperature and high electronic conductivity of WS 2 , LiBr–LiCl–LiF electrolyte with high ionic conductivity but the high melting point was selected. The structure and composition of WS 2 and LiBr–LiCl–LiF after reaction at high temperature (500 °C) were studied, and WS 2 was found to have good compatibility with ternary lithium electrolyte. Assembling Li–B/LiBr–LiCl–LiF/WS 2 single thermal battery, the discharge specific capacity is 952As g −1 at 300 mA cm −2 and cutoff voltage of 0.97 V. And the internal resistance of the single thermal battery is 11.87 mΩ under the super large pulse current density of 5A cm −2 . This further advances the application of WS 2 in thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Xue Tang,Bei Jiang,Qingtao Zhu,Xianfen Chen,Lei Xiao,Lijun Zhou,Junyan Chen,Jiabin Chen,Zhigao Liu,Quanping Yuan
ABSTRACT The multi-functionalization on wood and its derivant has gained more and more attention for its resource-rich, reproducible and biodegradable properties. In this work, a wood-based multifunctional composite displaying piezoelectric and moist-electric performance has been proposed. Wood porous material (WPM) was firstly prepared by delignification, oxidation and impregnation with MXene, in which zinc oxide (ZnO) was loaded via hydrothermal synthesis method. It can be found that the negative charge on the porous surface in MXene-impregnated WPM can attract Zn 2+ by electrostatic adsorption, creating a large number of nucleation sites for the growth of ZnO, thus accelerating its nucleation rate. Moreover, the increase of ZnO loading can enhance the fluidization current, so the obtained OWPM/MXene/ZnO moist-electrical generator (MEG) can generate an open-circuit voltage (V OC ) of 0.75 V at a test humidity of 85%RH, as well as can collect energy from hot steam with the V OC of about 0.4 V. Simultaneously, the heterojunction formed between ZnO and MXene further enhance the piezoelectric performance. Finally, a piezoelectric generator (PEG) with anisotropic piezoelectric sensing properties was prepared by the impregnation with polydimethylsiloxane (PDMS) in OWPM/MXene/ZnO and the follow densification. It can generate a V OC up to 4.71 V when a force of 45 N was applied perpendicular to the fiber direction. The four PEGs series connection can light up a LED. Consequently, the application performance of MEGs and PEGs based on wood materials highlight potential in piezoelectric and hydroelectric harvesters.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuanlang Wan,Xuefang Xie,Shuang Zhou,Weihang Li,Jingkang Ma,Yaqin Zhou,Yijian Song,Ji Zhou,Anqiang Pan
Li3VO4 (LVO) presents significant advantages in cost and capacity, making it a promising candidate for next-generation lithium-ion battery (LIB) anodes. However, its low electronic conductivity hampers practical applications. Herein, we report a Sm-modified Li3VO4/C composite (LSVO/C) designed for high-performance LIBs. Sm doping introduces additional defects and optimizes the electronic structure of Li3VO4, resulting in a significantly enhanced electronic conductivity (2.94 × 10–3 S cm–1) of the composites. Furthermore, the carbon-fiber-based framework effectively maintains structural stability during cycling, facilitating superior ion transport kinetics. Benefiting from these enhancements, the LSVO/C composite achieves remarkable discharge capacities of 379.5 mAh g–1 at 0.25 C and 260.1 mAh g–1 at 12.5 C. Additionally, an LSVO/C||NCM111 full cell, using LiNi1/3Co1/3Mn1/3O2 (NCM111) as the cathode, retains a discharge capacity of 50.5 mAh g–1 after 1000 cycles at 3.0 C, highlighting the potential of LSVO/C for practical applications. This unique method in preparing anode material will open new gates for highly efficient LIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 18
·7076-7083
·
IF 4.569
Bo Gu,Chenyang Zhan,Bing Heng Liu,Gang Wang,Qian Zhang,Ming Zhang,Zhongrong Shen
Perovskite-structured (ABO3) lithium lanthanum titanate (LixLa(2−x)/3TiO3, LLTO) is widely used in all solid state lithium ion batteries due to its high ionic conductivity. In this study, a two-dimensional LLTO nanosheet/graphene (LLTO/C) nanosheet composite has been designed as an electrode material for lithium-ion batteries (LIBs). LLTO/C not only exhibits the ionic conductivity properties of perovskite-type LLTO, but the graphene between the layers of LLTO nanosheets also endows the material with additional electronic conductivity. Moreover, LLTO@C-600 exhibits an excellent rate capability as the electrode for delithiation with a high specific capacity of 350 mA h g−1 at 20 mA g−1, and 70% of the specific capacity can be maintained at 1.0 A g−1 after 800 cycles. The excellent electrochemical performances can be attributed to the superior interficial capacitive Li+ storage capability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Cheng Chen,Yan-Hua Liu,Ming Zhu,Shi-Qing Zhao,Wen-Wen Xu,Linsen Chen,Wenbin Huang
Electrochromic devices are emerging as a futuristic technology for flexible electronics with the practical application values in energy-saving, displaying and military camouflage, however, the limitations in the optical, electrical and mechanical properties of the existing transparent conducting electrodes (TCEs) appear as a major obstacle for realizing high performance flexible electrochromic devices. In this work, we have proposed and demonstrated a fast-response and bendable polymer poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT: PSS) electrochromic device based on the embedded nickel (Ni) grid electrode. The Ni grid electrode, fabricated though patterned electroplating, has low sheet resistance (~1.3 Ω/sq), high transparency (~80%), excellent mechanical reliability and long-term chemical stability, exhibiting a figure of merit of 1250, surpassing the most existing TCEs. In addition, we have proposed a compact electrochromic architecture with the electrochromic PEDOT: PSS layer and solid polymer electrolyte being sandwiched between two embedded Ni grid electrodes. The device shows a short coloration and bleaching time (~1 s for 90% optical contrast), a high coloration efficiency (325 cm 2 /C) and excellent mechanical reliability (optical contrast retention ~80% after 1000 bending circles), paving a way for high performance flexible electronics.
研究领域:
材料科学
·
电子工程
·
光学
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2014
·Vol. 2014
·期 1
·193201
·
IF 1.611
Yuan-Jun Song,Jing Chen,Jing-Yuan Wu,Tong Zhang
Silver nanowire has potential applications on transparent conducting film and electrode of electrochemical capacitor due to its excellent conductivity. Transparent conducting film (G-film) was prepared by coating silver nanowires on glass substrate using Meyer rod method, which exhibited better performance than carbon nanotube and graphene. The conductivity of G-film can be improved by increasing sintering temperature. Electrode of electrochemical capacitor (I-film) was fabricated through the same method with G-film on indium tin oxide (ITO). CV curves of I-film under different scanning rates had obvious redox peaks, which indicated that I-film exhibited excellent electrochemical pseudocapacitance performance and good reversibility during charge/discharge process. In addition, the specific capacitance of I-film was measured by galvanostatic charge/discharge experiments, indicating that I-film exhibits high special capacitance and excellent electrochemical stability.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2019
·Vol. 9
·期 46
·1902473
·
IF 24.884
Zhuoxin Liu,Qi Yang,Donghong Wang,Guojin Liang,Youhuan Zhu,Funian Mo,Zhaodong Huang,Xinliang Li,Longtao Ma,Tiancheng Tang,Zhouguang Lu,Chunyi Zhi
The migration of zinc-ion batteries from alkaline electrolyte to neutral or mild acidic electrolyte promotes research into their flexible applications. However, discharge voltage of many reported zinc-ion batteries is far from satisfactory. On one hand, the battery voltage is substantially restricted by the narrow voltage window of aqueous electrolytes. On the other hand, many batteries yield a low-voltage discharge plateau or show no plateau but capacitor-like sloping discharge profiles. This impacts the battery's practicability for flexible electronics where stable and consistent high energy is needed. Herein, an aqueous zinc hybrid battery based on a highly concentrated dual-ion electrolyte and a hierarchically structured lithium-ion-intercalative LiVPO 4 F cathode is developed. This hybrid battery delivers a flat and high-voltage discharge plateau of nearly 1.9 V, ranking among the highest reported values for all aqueous zinc-based batteries. The resultant high energy density of 235.6 Wh kg −1 at a power density of 320.8 W kg −1 also outperforms most reported zinc-based batteries. A designed solid-state and long-lasting hydrogel electrolyte is subsequently applied in the fabrication of a flexible battery, which can be integrated into various flexible devices as powerful energy supply. The idea of designing such a hybrid battery offers a new strategy for developing high-voltage and high-energy aqueous energy storage systems.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chengfu Zeng,Wen Feng,Yu Shi,Xiaoyu Zhang,Yaxiong Yang,Xiaohua Zheng,Zhihe Liu,Yanxia Liu,Mingxia Gao,Chu Liang,Hongge Pan
Garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) is a promising solid-state electrolyte (SSE) because of its fast ionic conduction and notable chemical/electrochemical stability toward the lithium (Li) metal. However, poor interface wettability and large interface resistance between LLZTO and Li anode greatly restrict its practical applications. In this work, we develop an in situ chemical conversion strategy to construct a highly conductive Li2S@C layer on the surface of LLZTO, enabling improved interfacial wettability between LLZTO and the Li anode. The Li/Li2S@C-LLZTO-Li2S@C/Li symmetric cell has a low interface impedance of 78.5 Ω cm2, much lower than the 970 Ω cm2 of a Li/LLZTO/Li cell. Moreover, the Li/Li2S@C-LLZTO-Li2S@C/Li cell exhibits a high critical current density of 1.4 mA cm–2 and an ultralong stability of 3000 h at 0.1 mA cm–2. When used in a LiFePO4 battery, the Li/Li2S@C-LLZTO/LiFePO4 battery exhibits a high initial discharge capacity of 150.8 mA h g–1 at 0.2 C without lithium storage capacity attenuation during 200 cycles. This work provides a novel and feasible strategy to address interface issues of SSEs and achieve lithium-dendrite-free solid-state batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 12
·2200699
·
IF 4.149
Wanli Wang,Dongfang Yang,Zhenxing Huang,Han Hu,Licheng Wang,Kai Wang
Triboelectric nanogenerator (TENG) has the advantages of low cost, low weight, simple structure, and high efficiency. It is a promising low-frequency mechanical energy capture technology, which shows great potential in dealing with energy and environmental crisis and promoting new electronic products. TENGs have demonstrated irreplaceable design freedom over traditional electronic devices, including its ability to work independently of electrodes. In fact, the displacement current is an unreal current, it can work independently without electrodes. Moreover, due to the lack of “shielding effect” of the electrode, the surface potential can be larger than devices worked with electrodes. Here, based on TENG's high-voltage characteristic without electrode, the application of dust removal is explored, and a kind of electrodeless polyethylene triboelectric blackboard eraser was demonstrated as an example, which can effectively restrain the flying of chalk dust (limit the dust diffusion within 0.648 m). The electrostatic charge decayed blackboard eraser can be recharged by the electrodeless TENG without requirement of electrodes establishment. In fact, contact electrification may happen frequently in natural environment, and further design may be achieved without the limitation of electrodes.
研究领域:
能源技术
·
环境科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）