Lithium-ion capacitor with improved energy density via perfect matching silicon@3D graphene aerogel anode and BCNNTs cathode

2021 ◽  
Author(s):  
Hehe Jiang ◽  
Shouzhi Wang ◽  
Dong Shi ◽  
Fuzhou Chen ◽  
Yongliang Shao ◽  
...  
Keyword(s):  
Energy Density ◽  
Perfect Matching ◽  
Lithium Ion ◽  
Maximum Energy ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Lithium Ion Capacitor

Our designed Si@GA//BCNNTs LIC achieves a maximum energy density of 197.3 W h kg−1 at 225 W kg−1.

scholarly journals High stability gel electrolytes for long life lithium ion solid state supercapacitor

2021 ◽  
Vol 257 ◽  
pp. 01084
Author(s):  
Zhi Chen ◽  
Junxiang Li ◽  
Mengqiang Wu ◽  
Jiaxuan Liao
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Polyvinylidene Fluoride ◽  
Lithium Ion ◽  
Maximum Energy ◽  
Liquid Electrolyte ◽  
Hard Carbon ◽  
Gel Electrolytes ◽  
Lithium Ion Capacitor ◽  
Safety And Stability

Lithium ion capacitors with liquid electrolyte are prone to leakage, combustion, explosion and other dangerous accidents. To solve these problems, the solid gel separator prepared by polyvinylidene fluoride - six fluoropropene (PVDF-HFP) is used in this work to improve the safety and stability of lithium ion supercapacitors. The PVDF-HFP based gel separator was used to replace the commercial separator and electrolyte in the lithium ion capacitor. The solid-state lithium ion supercapacitor was matched with porous carbon (PC) and hard carbon (HC). The maximum energy density of the device is 148.76 wh/kg, even at the power density of 33.6 kW/kg, which still retains 20.6 wh/kg. In addition, 83.3% capacity of solid-state lithium-ion supercapacitor is retained after 8000 times of charge and discharge. The requirements of high power energy density, high cycle stability and high safety are realized.

Promoting the energy density of lithium-ion capacitor by coupling the pore-size and nitrogen content in capacitive carbon cathode

2021 ◽  
Vol 498 ◽  
pp. 229912
Author(s):  
Xuan Dai ◽  
Shulai Lei ◽  
Juan Liu ◽  
Zhitong Shang ◽  
Shengwen Zhong ◽  
...  
Keyword(s):  
Energy Density ◽  
Pore Size ◽  
Nitrogen Content ◽  
Lithium Ion ◽  
Carbon Cathode ◽  
Lithium Ion Capacitor

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.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

A high-voltage aqueous lithium ion capacitor with high energy density from an alkaline–neutral electrolyte

2019 ◽  
Vol 7 (8) ◽  
pp. 4110-4118 ◽  
Author(s):  
Chunyang Li ◽  
Wenzhuo Wu ◽  
Shuaishuai Zhang ◽  
Liang He ◽  
Yusong Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Anode ◽  
Biomass Carbon ◽  
Proof Of Concept ◽  
Lithium Ion Capacitor ◽  
Neutral Electrolyte

A proof-of-concept lithium ion capacitor comprising LiMn2O4 nanorods as the cathode, a nitrogen-rich biomass carbon anode and a stable alkaline–neutral electrolyte was designed and fabricated.

Nitrogen-Doped Defective Graphene Aerogel as Anode for all Graphene-Based Lithium Ion Capacitor

2017 ◽  
Vol 2 (27) ◽  
pp. 8436-8445 ◽  
Author(s):  
Xin Wang ◽  
Zhenkun Wang ◽  
Xin Zhang ◽  
Huifen Peng ◽  
Guoqing Xin ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Graphene Aerogel ◽  
Nitrogen Doped ◽  
Lithium Ion Capacitor ◽  
Defective Graphene

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.

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