ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 8
·2201425
·
IF 3.6
Lingling Liu,Hongdie Yin,Wei Guo,Bi Jia,Hanmei Jiang
Ti 3 C 2 T x MXene is one of the most promising electrode materials for supercapacitors, but it often suffers in poor experiment gravimetric capacitance, which limits practical applications in industry needs. Herein, etched Ti 3 C 2 T x MXene with high gravimetric capacitance is prepared by chemical etching of MXene with concentrated alkaline solution. The intercalation of K + and the scissor role of OH − can simultaneously enlarge the interlayer spacing and cut the size of sheets, which lead to the high active-site concentration and cation diffusion. As a result, the etched Ti 3 C 2 T x MXene displays high gravimetric capacitance of 368.1 F g −1 at 2 A g −1 and outstanding cycling stability without capacitance loss over 5000 cycles at 6 A g −1 ,and the surface capacitance contribution in etched Ti 3 C 2 T x MXene occurs to a greater extent compared with the pristine MXene. Moreover, the effect of chemical etching on the supercapacitor performance and energy-storage mechanism indicates that the active-size concentration and cation diffusion could be maximized when the chemical etching conditions are appropriate, leading to the highest performance of etched Ti 3 C 2 T x MXene. Herein, it is demonstrated that the chemical etching approach is applicable to design MXenes with high gravimetric capacitance to maximize their potential applications in energy-storage applications and other fields.
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
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Hao Yan,Jianghong Wang,Yuan Fang,Muxuan Zhou,Xiaoya Guo,Hui-Qiong Wang,Yang Dai,Wenrong Li,Jin-Cheng Zheng
Carbon anchored titanium carbonitride for supercapacitor electrode material was prepared by a direct semi-solid-sate carbonitridation method. The prepared sample is highly conductive and mesoporous (250 m 2 g −1 ), enabling fast electron transfer and ion transport. As a result, a high capacitance of 360 F g −1 at 0.5 A g −1 , and an impressive capacitance retention ratio 100Ag -1 /1 A g −1 of 53%, as well as long cyclic capability (>10,000 cycles) can be obtained in 1 M H 2 SO 4 . The thick electrode also presents a high area capacitance up to 1.77 F cm −2 . A flexible H 2 SO 4 /PVA symmetric supercapacitor was fabricated to demonstrate its practicality. Remarkably, the supercapacitor presents high-rate performance (up to 25 kW kg −1 ) and long cyclic performance (>10,000 cycles), illustrating its potential application in flexible integrated energy storage devices. This work provides a novel insight into designing and preparing carbonitride based materials for high performance supercapacitor .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Energies
·
2022
·Vol. 15
·期 13
·4932
·
IF 3.252
Zeyan Zhou,Taotao Zeng,Haoran Zhang,Ding Chen
Vanadium nitride (VN) with a wide working window has been identified as a promising electrode material candidate for batteries due to the high specific capacitance and the excellent electrical conductivity. Here, we have successfully prepared VCN nanobelts, which display mesoporous structure with high specific surface area (54.4 m2g−1) and the total pore volume was 0.266 cm3g−1. Furthermore, the prepared flexible Zn-ion battery (FZIB) with VCN-5 not only exhibited high specific capacitance (81 μAh cm−2), excellent rate capability, and long cyclic durability (77% after 1000 cycles at 0.6 mA cm−2) but also had the characteristics of flexibility. This FZIB is important to reduce the difficulty in thermal management and can be used in a series of applications, including wearable electric devices.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·073501
·
IF 4.386
Shi-Fang Ye,Ke-Hu Zhu,Wen-bin Ma,Li-Yang Dou,Pei-Xin Cui,Heng Sha,Xiao-dong Han,Xian-yong Wei,Xue-Yu Tao
With the rapid development of the wearable devices and flexible supercapacitors (FSCs), urgent demand for electrodes with high specific capacitance and excellent flexibility have been put forward. Herein, a self-standing conducting polymer hydrogel electrode has been successfully synthesized by in situ polymerization of aniline (ANI) in aqueous solution of polyvinyl alcohol (PVA), phytic acid (PA) and sodium chloride (NaCl). The prepared PANI/PVA/NaCl (PPN) hydrogel electrode shows high specific capacitance (1544 mF cm−2 at current density of 1 mA cm−2), good flexibility (elongation at fracture of 110%), satisfactory electrochemical stability (92% capacitance retention after 500 repeated bending cycles) and excellent cycling stability (78.2% capacitance retention after 10000 cycles) due to the uniform 3D interconnected structure driven by NaCl pseudo template. In order to further explore the potential application prospects of the synthesized hydrogel in flexible devices, a series of all-hydrogel-state FSCs are assembled based on the prepared PPN hydrogel electrodes and typical PVA/H2SO4 electrolyte. The assembled FSCs exhibit high energy density of 51.1 μWh cm−2 at power density of 250 μW cm−2 and long-life stability of 81.10% capacitance retention after 10000 charge/discharge cycles. This work provides a new synthesis strategy for the high performance energy storage electrodes and devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Bailin Gai,Qinglong Jing,Yanan Ji,Runze Wu,Qi Li,Xuexia He,Jie Sun,Ruibin Jiang,Zhibin Lei,Zong-Huai Liu
In the present work, a new strategy to prepare Ti 3 C 2 T x aerogel fiber with ultralight, highly orientated and excellent gravimetric capacitance is proposed, it consists of wet spinning of self-assembling liquid crystal phase Ti 3 C 2 T x ink with waterborne polyurethane (WPU) as a functional additive in chitosan coagulated bath and followed by bidirectional freeze-drying process with Cu bridge as thermal conductive substrate, and Ti 3 C 2 T x /WPU (T/W) aerogel fiber with ultralight, highly orientated, good tensile strength, excellent gravimetric capacitance and rate performance is prepared. T/W-1 aerogel fiber electrode exhibits a low density of 0.15 g cm −3 , excellent gravimetric capacitance of 402 F g −1 at 1 A g −1 and an outstanding rate performance of 82 % at 10 A g −1 . All-solid-state Ti 3 C 2 T x aerogel fiber supercapacitor (T/W-1 aerogel FSC) with ultralight, good flexibility and high gravimetric capacitance is assembled, it not only shows a gravimetric capacitance of 124 F g −1 and an energy density of 6.2 Wh Kg −1 at a power density of 150.0 W kg −1 , but also displays a capacity retention of 97 % after 100 bending times at 180°. The impressing ultralight, good flexibility and high gravimetric capacitance make T/W-1 aerogel FSC a promising flexible power source in the fields of portable and wearable electronic devices.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2017
·Vol. 10
·期 4
·941-949
·
IF 29.518
Yang Wang,Wenhui Lai,Ni Wang,Zhi Jiang,Xuanyu Wang,Peichao Zou,Ziyin Lin,Hong Jin Fan,Feiyu Kang,Ching-Ping Wong,Cheng Yang
Developing supercapacitor electrodes with an ultra-long cycle life and a high specific capacitance is critical to the future energy storage devices. Herein, we report a scalable synthesis technology of mixed-valence manganese oxide nanoparticles anchored to reduced graphene oxide (rGO/MnOx) as the high-performance supercapacitor electrodes. First, 2-dimensional (2D) δ-MnO2 nanosheets are formed on a graphene oxide (GO) template, which is then in situ reduced by hydrazine vapour to mixed-valence manganese oxide nanoparticles evenly distributed on a rGO conductive network. The obtained rGO/MnOx electrode material exhibits a high specific capacitance of 202 F g−1 (mass loading of 2 mg cm−2), a large areal specific capacitance of 2.5 F cm−2 (mass loading of up to 19 mg cm−2), and a super-long-life stability of 106% capacitance retention after 115 000 charge/discharge cycles. By using an ionic liquid electrolyte and an activated carbon anode, asymmetric supercapacitors (AScs) are also constructed and can be packaged into a high performance miniaturized energy storage component in either a tailorable or surface mountable configuration. Our ASc shows superior performance characteristics, with typical figures of merit including maximum energy densities of 47.9 W h kg−1 at 270 W kg−1 and 19.1 W h kg−1 at the maximum power density of 20.8 kW kg−1. The capacitance retention of the ASc is 96% after 80 000 charge/discharge cycles, which is the most excellent stability performance in an ionic liquid electrolyte as compared with the recently reported pseudo-supercapacitors. This technology may find vast applications in future miniaturized portable and wearable electronics.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 46
·期 1
·370-382
·
IF 5.164
Yuzhe Liu,Hao Wang,Chengcai Li,Shaohui Wang,Lin Li,Chengwen Song,Tonghua Wang
Summary The development of electric vehicles is increasing the demand for supercapacitors, for which carbon materials can make excellent electrodes. In this study, waste scraps of polyimide (PI) film were used to fabricate several flaky porous carbon materials for use as supercapacitor electrodes. The pore structure and functional groups of the porous carbons were tailored by KOH activation. The relationships between pore structure, the carbon matrix, functional groups, and electrochemical performance were investigated via N 2 adsorption, XRD, Raman spectroscopy, FT-IR, XPS, and electrochemical measurements. The flaky porous carbon materials have a graded distribution of hierarchical pore structures and are rich in O/N functional groups. They have an outstanding capacitance retention rate and a high specific capacitance of 482 F g −1 , which is higher than those of PI film-based porous carbons prepared by physical activation and of commercial activated carbon electrodes. Their flaky structure endows them with lower impedance than commercial AC. The materials were used to fabricate electrodes for symmetrical supercapacitors, which displayed high energy densities and excellent cycling stability. This work provides an environmentally benign strategy for the re-use of waste PI film.
研究领域:
材料科学
·
环境科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Peng Zhang,Zhimeng Liu,Yuping Liu,Hongbo Fan,Yuanqi Jiao,Baiman Chen
In this work, we demonstrate a facile approach to synthesize high-performance and stable TiO 2 @PANI core-shell nanowires (NWs) as flexible electrodes for solid-state supercapacitors (SCs). The TiO 2 @PANI core-shell NWs are grown directly on highly conductive carbon cloth, which not only give efficient charge transport and accessible diffusion of the electrolyte, but also provide large surface area and active sites for redox reaction as well as good strain accommodation. Such these features enable them to deliver a large areal capacitance of 520.3 mF/cm 2 at 0.5 mA/cm 2 with outstanding rate capability. Furthermore, a flexible and stable solid-state SC device based on these TiO 2 @PANI core-shell NWs is also demonstrated. The as-fabricated solid-state SC device yields a remarkable volumetric capacitance of 898.4 mF/cm 3 , excellent flexibility and significant cycling stability with more than 97.2% retention of its capacitance after 10000 cycles. We believe that these findings may open up new opportunities to prepare high-performance PANI-based electrodes for flexible solid-state SCs.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
功能材料
·
柔性电子学
✓ 已验证
DOI
高影响因子
Batteries & Supercaps
·
2025
·
IF 4.7
Xu Zhang,Heng Xiang,Chuang Pang,Keyu Zhao,Zhongli Zou,Kui Cheng
The development of flexible energy-storage devices is limited by the poor conductivity, limited cycling stability, and slow electron/ion transport of metal oxides. Optimizing their structure and performance is crucial for advancing these technologies. Herein, a hollow cubic core–shell Co 3 O 4 @MnO 2 is synthesized via annealing and hydrothermal approaches. This composite enjoys advantages of the high electrical conductivity of Co 3 O 4 and the excellent pseudocapacitive properties of MnO 2 ; in addition, the hollow structure of the composite effectively mitigates the mechanical stress caused by volume changes during charge–discharge cycles. Owing to its large specific surface area and stable framework, Co 3 O 4 @MnO 2 achieves a high specific capacitance of 670.2 F g −1 and retains 83.18% of its initial capacitance after 10,000 cycles, demonstrating exceptional electrochemical stability and durability. Subsequently, an all-solid-state flexible supercapacitor was assembled using Co 3 O 4 @MnO 2 positive electrode and a negative electrode made of reduced graphene oxide hydrogel. The device achieves a high energy density of 78.2 W h kg −1 and a power density of 11,500 W kg −1 . Further, even after 10,000 charge–discharge cycles, it retained 73.1% of its initial capacitance, demonstrating potential for flexible energy-storage applications. This article highlights the advantages of Co 3 O 4 @MnO 2 in enhancing supercapacitor performance and offers insights for cost-effective cobalt-based energy-storage systems. Graphical The diagram illustrates the synthesis process of Co 3 O 4 @MnO 2 composites, in which a hollow core–shell structure is successfully constructed with Co 3 O 4 cages serving as the core and MnO 2 nanosheets as the shell.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fangbao Fu,Dongjie Yang,Wenli Zhang,Huan Wang,Xueqing Qiu
Two-dimensional porous carbon materials are very promising for energy storage/conversion due to their unique microstructure, reasonable pore structure and excellent electrochemical properties. A green and facile in-situ carbonization technique is innovated to prepare a unique porous lignin-derived carbon quasi-nanosheets (PLC) with rational pore distribution, large surface area, and excellent conductivity. The lignosulfonate/zinc oxalate composite was firstly self-assembled by hydrophobic bond of the amphiphilic structure in lignosulfonate using ethanol/water solvent without the need to use any toxic material, followed by co-pyrolysis at a high temperature with gas-exfoliation and in-situ templating of zinc oxalate. The resulting PLC exhibits a very high specific capacitance of 320 F/g at 1.0 A/g and long cycling stability (remains 93.5% after 10,000 cycles at 5.0 A/g). In addition, when assembling into symmetric supercapacitors in PVA/KOH gel electrolytes, PLC also shows a high specific capacitance of 274 F/g at 0.5 A/g with excellent rate capability and a high specific energy density (9.75 W h/kg at 6157.9 W/kg). These excellent electrochemical performances indicate that the as-prepared PLC should hold great promise for the energy storage devices, opening a new path for the preparation of advanced carbon electrode material and high-value-added utilization of biomass.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 22
·8851-8859
·
IF 8.262
Muhammad Sufyan Javed,Cuiling Zhang,Lin Chen,Yi Xi,Chenguo Hu
Binary metal oxides have been considered as promising electrode materials for high performance pseudocapacitors because they offer higher electrochemical activity than mono metal oxides. The rational design of binder free electrode architecture is an efficient solution to the further enhancement of the performance of electrochemical supercapacitors. Herein, we report the synthesis of a hierarchical mesoporous NiFe2O4 (NFO) nanocone forest directly growing on carbon textile with ultra-high surface area by the hydrothermal method. The NiFe2O4 nanocone forest on carbon textile (NFO-CT) was used as a binder free electrode that exhibited the high capacitance of 697 F g−1 at a scan rate of 5 mV s−1 and was further used for the fabrication of a symmetric solid state supercapacitor. The open space between hierarchical nanocones allows easy diffusion for electrolyte ions and the carbon textile ensures fast electron transfer that leads to the remarkable electrochemical performance. The NFO-CT solid state supercapacitor exhibited the high capacitance of 584 F g−1 at a scan rate of 5 mV s−1 and 93.57% capacitance retention after 10 000 cycles with the advantages of being light weight, thin and having good flexibility. A high energy density of 54.9 W h kg−1 at a power density of 300 W kg−1 was achieved, indicating the excellent energy storage features. Furthermore, three charged supercapacitors in series can light 4 red colored LEDs (2 V, 15 mA) for 2 min.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Chunyu Xu,Yajuan Jiang,Shijie Ren,Tao Huang,Xiuyun Zhang,Guisheng Zhu,Kunpeng Jiang,Yunyun Zhao,Huarui Xu
In this paper, a facile bio-templating method is proposed to prepare NiCoP coated on amorphous carbon (NiCoP@AC) composite electrode materials with using bagasse as template and carbon source. NiCoP nanowire network arrays precursors coating on bagasse substrate with high yield were prepared via a novel synthesis strategy utilizing the toluene-water interface reaction process, which subsequently formed as NiCoP@AC composite electrode materials after phosphating process. The assembled core-shell structure attenuated the volume expansion during charging and discharging, additionally, the overall electrical conductivity of the composite was also improved owing to the characteristic of bagasse biochar. The NiCoP@AC electrode exhibited high specific capacitance (1706 F g −1 at 1 A g −1 ), outstanding rate capability (82.1 % capacity retention from 1 to 20 A g −1 ) and good cycling stability (retaining 80.0 % capacitance over 5000 cycles). In addition, bagasse biomass activated carbon (BAC) was prepared via a typical alkaline activation process for the use as negative electrode. The as-fabricated NiCoP@AC//BAC supercapacitor displayed a high energy density of 46.2 Wh kg −1 at a power density of 807.3 W kg −1 , and an excellent capacitance retention rate (88.5 % after 5000 cycles), suggesting that the as-prepared NiCoP@AC electrode materials have wide application prospects in high-performance supercapacitors.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
生物基材料
·
功能复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）