Facile synthesis of porous iron oxide/graphene hybrid nanocomposites and potential application in electrochemical energy storage

2017 ◽  
Vol 41 (22) ◽  
pp. 13553-13559 ◽  
Author(s):  
Jiakang Min ◽  
Krzysztof Kierzek ◽  
Xuecheng Chen ◽  
Paul K. Chu ◽  
Xi Zhao ◽  
...  

A facile and efficient method is used to synthesize porous iron oxide coated with graphene as electrode materials for lithium-ion batteries and supercapacitors.

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1064 ◽  
Author(s):  
Elisa Thauer ◽  
Alexander Ottmann ◽  
Philip Schneider ◽  
Lucas Möller ◽  
Lukas Deeg ◽  
...  

Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices. (2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.


2019 ◽  
Vol 7 (9) ◽  
pp. 4334-4352 ◽  
Author(s):  
Yan-Song Xu ◽  
Shu-Yi Duan ◽  
Yong-Gang Sun ◽  
De-Shan Bin ◽  
Xian-Sen Tao ◽  
...  

Due to their abundant resources and potential price advantage, potassium-ion batteries (KIBs) have recently drawn increasing attention as a promising alternative to lithium-ion batteries (LIBs) for their applications in electrochemical energy storage applications.


Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1207 ◽  
Author(s):  
Gong ◽  
Gao ◽  
Hu ◽  
Zhou

Micro/nanostructured spherical materials have been widely explored for electrochemical energy storage due to their exceptional properties, which have also been summarized based on electrode type and material composition. The increased complexity of spherical structures has increased the feasibility of modulating their properties, thereby improving their performance compared with simple spherical structures. This paper comprehensively reviews the synthesis and electrochemical energy storage applications of micro/nanostructured spherical materials. After a brief classification, the concepts and syntheses of micro/nanostructured spherical materials are described in detail, which include hollow, core-shelled, yolk-shelled, double-shelled, and multi-shelled spheres. We then introduce strategies classified into hard-, soft-, and self-templating methods for synthesis of these spherical structures, and also include the concepts of synthetic methodologies. Thereafter, we discuss their applications as electrode materials for lithium-ion batteries and supercapacitors, and sulfur hosts for lithium–sulfur batteries. The superiority of multi-shelled hollow micro/nanospheres for electrochemical energy storage applications is particularly summarized. Subsequently, we conclude this review by presenting the challenges, development, highlights, and future directions of the micro/nanostructured spherical materials for electrochemical energy storage.


2020 ◽  
Vol 12 (1) ◽  
Author(s):  
JiPing Zhu ◽  
GuangShun Xiao ◽  
XiuXiu Zuo

AbstractTwo-dimensional black phosphorus (2D BP), an emerging material, has aroused tremendous interest once discovered. This is due to the fact that it integrates unprecedented properties of other 2D materials, such as tunable bandgap structures, outstanding electrochemical properties, anisotropic mechanical, thermodynamic, and photoelectric properties, making it of great research value in many fields. The emergence of 2D BP has greatly promoted the development of electrochemical energy storage devices, especially lithium-ion batteries. However, in the application of 2D BP, there are still some problems to be solved urgently, such as the difficulty in the synthesis of large-scale high-quality phosphorene, poor environmental stability, and the volume expansion as electrode materials. Herein, according to the latest research progress of 2D BP in the field of energy storage, we systematically summarize and compare the preparation methods of phosphorene and discuss the basic structure and properties of BP, especially the environmental instability and passivation techniques. In particular, the practical application and challenges of 2D BP as anode material for lithium-ion batteries are analyzed in detail. Finally, some personal perspectives on the future development and challenges of BP are presented.


Ionics ◽  
2020 ◽  
Vol 26 (9) ◽  
pp. 4327-4338
Author(s):  
Chaoyu Duan ◽  
Fuliang Zhu ◽  
Chen Wang ◽  
Xinyou Ke ◽  
Guofeng Ren ◽  
...  

2017 ◽  
Vol 5 (36) ◽  
pp. 19175-19183 ◽  
Author(s):  
Shan Zhu ◽  
Kui Xu ◽  
Simi Sui ◽  
Jiajun Li ◽  
Liying Ma ◽  
...  

A graphene-reinforced N-doping porous carbon network is fabricated using a simple strategy for the electrodes of supercapacitors and lithium ion batteries.


2018 ◽  
Vol 47 (8) ◽  
pp. 2837-2872 ◽  
Author(s):  
Wenshuai Chen ◽  
Haipeng Yu ◽  
Sang-Young Lee ◽  
Tong Wei ◽  
Jian Li ◽  
...  

Nanocellulose from various kinds of sources and nanocellulose-derived materials have been developed for electrochemical energy storage, including supercapacitors, lithium-ion batteries, lithium–sulfur batteries, and sodium-ion batteries.


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