Achieving high energy density in a 4.5 V all nitrogen-doped graphene based lithium-ion capacitor

2019 ◽  
Vol 7 (34) ◽  
pp. 19909-19921 ◽  
Author(s):  
Ronghua Wang ◽  
Qiannan Zhao ◽  
Weikang Zheng ◽  
Zongling Ren ◽  
Xiaolin Hu ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
High Power Density ◽  
Ultrahigh Energy ◽  
Nitrogen Doped ◽  
Lithium Ion Capacitor ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

A 4.5 V “dual carbon” LIC device is constructed based on all nitrogen doped graphene nanostructures. It could achieve an ultrahigh energy density of 187.9 W h kg−1 at a high power density of 2250 W kg−1 due to the alleviating kinetic mismatch.

Three-Dimensional Porous Nitrogen doped Graphene Hydrogel for High Energy Density supercapacitors

2016 ◽  
Vol 213 ◽  
pp. 291-297 ◽  
Author(s):  
Dan Liu ◽  
Chaopeng Fu ◽  
Ningshuang Zhang ◽  
Haihui Zhou ◽  
Yafei Kuang
Keyword(s):  
Energy Density ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors

2017 ◽  
Vol 5 (11) ◽  
pp. 5523-5531 ◽  
Author(s):  
Li Liu ◽  
Lijun Su ◽  
Junwei Lang ◽  
Bin Hu ◽  
Shan Xu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Controllable Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Supercapacitors using ionic liquids (ILs) as electrolytes have triggered great interest due to their much higher energy density when compared to aqueous supercapacitors.

Free-standing macro-porous nitrogen doped graphene film for high energy density supercapacitor

2019 ◽  
Vol 318 ◽  
pp. 865-874 ◽  
Author(s):  
Yanan Jin ◽  
Yuena Meng ◽  
Wei Fan ◽  
Hengyi Lu ◽  
Tianxi Liu ◽  
...  
Keyword(s):  
Energy Density ◽  
Graphene Film ◽  
High Energy ◽  
High Energy Density ◽  
Free Standing ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Electron Microscopy Investigation of Rice Husk-Derived Silicon-Tin/Nitrogen-Doped Graphene Composites Nanostructure

2020 ◽  
Vol 302 ◽  
pp. 51-61 ◽  
Author(s):  
Viratchara Laokawee ◽  
Thanapat Autthawong ◽  
Bralee Chayasombat ◽  
Aishui Yu ◽  
Thapanee Sarakonsri
Keyword(s):  
Electron Microscopy ◽  
Lithium Ion Batteries ◽  
Rice Husk ◽  
Anode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nowadays, there is an increasing of the demanding in high energy density lithium-ion batteries (LIBs) due to the growing of energy storage needs for electronic vehicles and portable devices. Silicon (Si) and Tin (Sn) are the promising anode materials for LIBs due to their high theoretical capacity of 4200 mAh/g and 994 mAh/g. Moreover, Si can be derived from rice husk which is the main agricultural product in Thailand. However, the using of Si and Sn encounters with the huge volume expansion during lithiation and delithiation process. To alleviate this problem, Nitrogen-doped graphene (NrGO), carbon supporter, is used as composite with these metals to buffer the volume change and increase the electrical conductivity of composites. This work aims to synthesis Si/NrGO and SiSn/NrGO nanocomposites and Si used in these composites is derived from rice husk. All products were characterized by X-rays diffraction (XRD), Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. XRD results showed that the composites contained phases of Si, Sn and carbon. The electron microscopy techniques were the main part to clarify the morphology and distribution of Si and Sn particles on NrGO. SEM and TEM results confirm that there were small sized particles of Si and Sn dispersed and covered on NrGO surface. Furthermore, the electrochemical properties of prepared composites were measured to confirm their efficiency as anode materials in lithium-ion batteries by coin cell assembly. The composite with 10 percent Si and 10 percent Sn on NrGO could deliver a high capacity around 480 mAh/g over 100 cycles and expected to use as anode materials in the next generation lithium-ion batteries.

scholarly journals Nitrogen-enriched graphene framework from a large-scale magnesiothermic conversion of CO2 with synergistic kinetics for high-power lithium-ion capacitors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Chen Li ◽  
Xiong Zhang ◽  
Kai Wang ◽  
Xianzhong Sun ◽  
Yanan Xu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Power ◽  
Power Output ◽  
Large Scale ◽  
Electrode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Chemical Doping ◽  
Lithium Ion Capacitor

AbstractLithium-ion capacitors are envisaged as promising energy-storage devices to simultaneously achieve a large energy density and high-power output at quick charge and discharge rates. However, the mismatched kinetics between capacitive cathodes and faradaic anodes still hinder their practical application for high-power purposes. To tackle this problem, the electron and ion transport of both electrodes should be substantially improved by targeted structural design and controllable chemical doping. Herein, nitrogen-enriched graphene frameworks are prepared via a large-scale and ultrafast magnesiothermic combustion synthesis using CO2 and melamine as precursors, which exhibit a crosslinked porous structure, abundant functional groups and high electrical conductivity (10524 S m−1). The material essentially delivers upgraded kinetics due to enhanced ion diffusion and electron transport. Excellent capacities of 1361 mA h g−1 and 827 mA h g−1 can be achieved at current densities of 0.1 A g−1 and 3 A g−1, respectively, demonstrating its outstanding lithium storage performance at both low and high rates. Moreover, the lithium-ion capacitor based on these nitrogen-enriched graphene frameworks displays a high energy density of 151 Wh kg−1, and still retains 86 Wh kg−1 even at an ultrahigh power output of 49 kW kg−1. This study reveals an effective pathway to achieve synergistic kinetics in carbon electrode materials for achieving high-power lithium-ion capacitors.

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