期刊文献+
共找到9篇文章
< 1 >
每页显示 20 50 100
Recent progress in 2D materials for flexible supercapacitors 被引量:11
1
作者 Yan Han Yu Ge +2 位作者 Yunfeng Chao Caiyun Wang Gordon G.Wallace 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期57-72,共16页
High performance supercapacitors coupled with mechanical flexibility are needed to drive flexible and wearable electronics that have anesthetic appeal and multi-functionality. Two dimensional(2D) materials have attr... High performance supercapacitors coupled with mechanical flexibility are needed to drive flexible and wearable electronics that have anesthetic appeal and multi-functionality. Two dimensional(2D) materials have attracted attention owing to their unique physicochemical and electrochemical properties, in addition to their ability to form hetero-structures with other nanomaterials further improving mechanical and electrochemical properties. After a brief introduction of supercapacitors and 2D materials, recent progress on flexible supercapacitors using 2D materials is reviewed. Here we provide insights into the structure–property relationships of flexible electrodes, in particular free-standing films. We also present our perspectives on the development of flexible supercapacitors. 展开更多
关键词 2D materials Flexible supercapacitors Graphene Molybdenum disulfide MXenes
下载PDF
MXene-based materials for electrochemical energy storage 被引量:49
2
作者 Xu Zhang Zihe Zhang Zhen Zhou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期73-85,共13页
Rechargeable batteries and supercapacitors are widely investigated as the most important electrochemical energy storage devices nowadays due to the booming energy demand for electric vehicles and hand-held electronics... Rechargeable batteries and supercapacitors are widely investigated as the most important electrochemical energy storage devices nowadays due to the booming energy demand for electric vehicles and hand-held electronics. The large surface-area-to-volume ratio and internal surface areas endow two-dimensional(2D) materials with high mobility and high energy density; therefore, 2D materials are very promising candidates for Li ion batteries and supercapacitors with comprehensive investigations. In 2011, a new kind of 2D transition metal carbides, nitrides and carbonitrides, MXene, were successfully obtained from MAX phases. Since then about 20 different kinds of MXene have been prepared. Other precursors besides MAX phases and even other methods such as chemical vapor deposition(CVD) were also applied to prepare MXene, opening new doors for the preparation of new MXene. Their 2D nature and good electronic properties ensure the inherent advantages as electrode materials for electrochemical energy storage. In this review, we summarize the recent progress in the development of MXene with emphasis on the applications to electrochemical energy storage. Also, future perspective and challenges of MXene-based materials are briefly discussed regrading electrochemical energy storage. 展开更多
关键词 MXene2D materials Electrochemical energy storage Batteries supercapacitors
下载PDF
Graphene fiber based supercapacitors:Strategies and perspective toward high performances 被引量:3
3
作者 Qiuyan Yang Zhen Xu Chao Gao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期6-11,共6页
Modern wearable electronics are thirsty for flexible, lightweight energy storage and supply devices. Flexible fiber-shaped supercapacitors, possess good flexibility, high power density, fast charging capability and lo... Modern wearable electronics are thirsty for flexible, lightweight energy storage and supply devices. Flexible fiber-shaped supercapacitors, possess good flexibility, high power density, fast charging capability and long cycle life, becoming a promising option for wearable devices. The past decade has witnessed the emergence of graphene fiber based supercapacitors(GFSCs) as one of the most active vicinity in fiber-supercapactiors, for their excellent properties including high surface area, chemical stability, excellent electrical conductivity, lightweight and mechanical properties. In this perspective, we introduced the basic energy storage mechanisms of GFSCs, followed by the analysis in improving their overall performances, recent advances, and a conclusive discussion on the challenges and opportunities. 展开更多
关键词 Graphene Fiber Two-dimensional materials supercapacitors Energy storage
下载PDF
The roles of graphene in advanced Li-ion hybrid supercapacitors 被引量:2
4
作者 Junwei Lang Xu Zhang +3 位作者 Bao Liu RutaoWang Jiangtao Chen Xingbin Yan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期43-56,共14页
Lithium-ion hybrid supercapacitors (LIHSs), also called Li-ion capacitors, are electrochemical energy stor- age devices that combining the advantages of high power density of supercapacitor and high energy density o... Lithium-ion hybrid supercapacitors (LIHSs), also called Li-ion capacitors, are electrochemical energy stor- age devices that combining the advantages of high power density of supercapacitor and high energy density of Li-ion battery. However, high power density and long cycle life are still challenges for the cul~ rent LIHSs due to the imbalance of charge-storage capacity and electrode kinetics between capacitor-type cathode and battery-type anode. Therefore, great efforts have been made on designing novel cathode materials with high storage capacity and anode material with enhanced kinetic behavior for LIHSs. With unique two-dimensional form and numerous appealing properties, for the past several years, the rational designed graphene and its composites materials exhibit greatly improved electrochemical performance as cathode or anode for LIHSs. Here, we summarized and discussed the latest advances of the state- of-art graphene-based materials for LIHSs applications. The major roles of graphene are highlighted as (1) a superior active material, (2) ultrathin 2D flexible support to remedy the sluggish reaction of the metal compound anode, and (3) good 2D building blocks for constructing macroscopic 3D pOFOUS car- bonjgraphene hybrids. In addition, some high performance aqueous LIHSs using graphene as electrode were also summarized. Finally, the perspectives and challenges are also proposed for further develop- ment of more advanced graphene-based LIHSs. 展开更多
关键词 Graphene Li-ion hybrid supercapacitors supercapacitor Lithium ion batteries Carbon materials Metal oxide Naoocomposites
下载PDF
Engineering graphene for high-performance supercapacitors: Enabling role of colloidal chemistry 被引量:1
5
作者 Ke Zhang Xiaowei Yang Dan Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期1-5,共5页
The high electrical conductivity and high specific surface area of graphene are traditionally regarded as the most intriguing features for its promise as the electrode material for supercapacitors. In this perspective... The high electrical conductivity and high specific surface area of graphene are traditionally regarded as the most intriguing features for its promise as the electrode material for supercapacitors. In this perspective, we highlight that from the engineering point of view, the unique colloidal chemistry of chemically functionalized graphene is the key property that has made graphene stand out as a promising nanoscale building block for constructing unique nanoporous electrodes for capacitive energy storage, We present several examples to demonstrate bow the non-covalent colloidal forces between graphene sheets can be harnessed to engineer the nanostructure of graphene-based bulk electrodes for supercapacitors based on both the electrical double layer storage and the redox reaction or pseudo-capacitance mechanisms. The colloidal engineering strategy can be extended to enable other nanomaterials to achieve high energy storage performance. 展开更多
关键词 Graphene Colloidal chemistry supercapacitors Nanoporous structure Two-dimensional materials
下载PDF
Microbe-derived carbon materials for electrical energy storage and conversion
6
作者 Li Wei H.Enis Karahan +5 位作者 Shengli Zhai Yang Yuan Qihui Qian Kunli Goh Andrew Keong Ng Yuan Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第2期189-196,共8页
Microbes are microscopic living organisms that surround us which include bacteria, archaea, most protozoa, and some fungi and algae. In recent years, microbes have been explored as novel precursors to synthesize carbo... Microbes are microscopic living organisms that surround us which include bacteria, archaea, most protozoa, and some fungi and algae. In recent years, microbes have been explored as novel precursors to synthesize carbon-based(nano)materials and as substrates or templates to produce carbon-containing(nano)composites. Being greener and more affordable, microbe-derived carbons(MDCs) offer good potential for energy applications. In this review, we describe the unique advantages of MDCs and outline the common procedures to prepare them. We also extensively discuss the energy applications of MDCs including their use as electrodes in supercapacitors and lithium-ion batteries, and as electrocatalysts for processes such as oxygen reduction, oxygen evolution, and hydrogen evolution reactions which are essential for fuel cell and water electrochemical splitting cells. Based on the literature trend and our group's expertise, we propose potential research directions for developing new types of MDCs. This review, therefore, provides the state-of-the-art of a new energy chemistry concept. We expect to stimulate future research on the applications of MDCs that may address energy and environmental challenges that our societies are facing. 展开更多
关键词 Microbe Carbon materials supercapacitor Lithium-ion battery Oxygen reduction reaction Hydrogen evolution reaction
下载PDF
Preface:Innovative electrode materials for supercapacitors
7
作者 Hengxing Ji Hongxia Wang 《Science China Materials》 SCIE EI CSCD 2018年第2期131-132,共2页
Portable electrical power sources play increasingly vital roles in our daily lives due to the widespread use of mobile electronic devices and electrical vehicles.Electrochemical capacitors,also referred as supercapaci... Portable electrical power sources play increasingly vital roles in our daily lives due to the widespread use of mobile electronic devices and electrical vehicles.Electrochemical capacitors,also referred as supercapacitors(SCs)or ultracapacitors,are an important type of energy storage system with superior advantages of rapid power delivery and recharging compared to other types of energy storage systems.In practice,SCs have played im- 展开更多
关键词 SC Preface:Innovative electrode materials for supercapacitors FLEXIBLE
原文传递
Highly nitrogen and sulfur dual-doped carbon microspheres for supercapacitors 被引量:6
8
作者 Wen Lei Junpo Guo +3 位作者 Zexing Wu Cuijuan Xuan Weiping Xiao Deli Wang 《Science Bulletin》 SCIE EI CAS CSCD 2017年第14期1011-1017,共7页
Heteroatom doping, especially dual-doped carbon materials have attracted much attention for the past few years, and have been regarded as one of the most efficient strategies to enhance the capacitance behavior of por... Heteroatom doping, especially dual-doped carbon materials have attracted much attention for the past few years, and have been regarded as one of the most efficient strategies to enhance the capacitance behavior of porous carbon materials. In this work, a facile two-step synthetic route was developed to fab- ricate nitrogen and sulfur co-doped carbon microsphere (NSCM) by using thiourea as dopant. The NJS doping content is controlled via varying the carbonization temperature. It has been proved that a suitable quantity of N and S groups could not only provide pseudo-capacitance but also promote the electron transfer for carbon materials, which ensures the further utilization of the exposed surfaces for charge storage. The optimized NSCM prepared at a carbonization temperature of 800 ℃ (NSCM-800) achieves a capacitance of 277.1 F g^-1 at a current density of 0.3 A g^-1 in 6.0 mol L^-1 KOH electrolyte, which is 71% higher than that of undoped carbon microsphere. Besides, NSCM-800 shows an excellent cycling stability, 98.2% of the initial capacitance is retained after 5,000 cvcles at a current densitv of 3.0 A g^-1. 展开更多
关键词 Carbon microsphere Heteroatoms doping supercapacitor Electrode materials
原文传递
Flexible supercapacitors based on carbon nanotubes 被引量:8
9
作者 Lili Liu Zhiqiang Niu Jun Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第4期571-581,共11页
Since carbon nanotubes(CNTs) possess unique one dimensional(1D) structure, considerable attention has been paid to constructing CNTs into macroscopic materials with different dimensions, including 1D fibers,2D fil... Since carbon nanotubes(CNTs) possess unique one dimensional(1D) structure, considerable attention has been paid to constructing CNTs into macroscopic materials with different dimensions, including 1D fibers,2D films, and 3D foams. Such macroscopic CNT materials exhibit high conductivity, large surface area, as well as good mechanical properties, and thus can be directly used as the flexible supercapacitor(SC) electrodes or the scaffolds for supporting pseudo-capacitive electrode materials. Based on these macroscopic CNT electrodes, diverse SCs with different structures, including flexible, stretchable and/or compressible fiber and thin film SCs, have been designed. This review provides an overview of recent progress towards the development of flexible SCs based on macroscopic CNTs-based electrodes, with a focus on electrode preparation and configuration design as well as their integration with other multifunctional devices.Future development and prospects in the CNTs-based flexible SCs are also discussed. 展开更多
关键词 Carbon nanotubes Flexible supercapacitors Macroscopic materials Pseudo-capacitive materials Integration
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部