Nb2O5 nanoparticles encapsulated in ordered mesoporous carbon matrix as advanced anode materials for Li ion capacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71338-71344 ◽  
Author(s):  
Jingjie Wang ◽  
Hongsen Li ◽  
Laifa Shen ◽  
Shengyang Dong ◽  
Xiaogang Zhang
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Mesoporous Carbon ◽  
Anode Materials ◽  
High Performance ◽  
Carbon Matrix ◽  
High Energy ◽  
High Energy Density ◽  
Ordered Mesoporous ◽  
Li Ion

A high performance Li ion capacitor was constructed with Nb2O5/CMK-3 as anode and activated carbon as cathode, which demonstrated high energy density and power density benefit from the combination of the merits of batteries and supercapacitors.

Graphene-based ordered mesoporous carbon hybrids with large surface areas for supercapacitors

2018 ◽  
Vol 42 (9) ◽  
pp. 7043-7048 ◽  
Author(s):  
Yun Deng ◽  
Aifei Xu ◽  
Wangting Lu ◽  
Yanhua Yu ◽  
Cheng Fu ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Mesoporous Carbon ◽  
Specific Capacity ◽  
High Energy ◽  
Ordered Mesoporous Carbon ◽  
High Energy Density ◽  
Long Cycle Life ◽  
Surface Areas ◽  
Ordered Mesoporous

Graphene-ordered mesoporous carbon hybrids exhibited advanced specific capacity, high energy density and power density, and long cycle life.

scholarly journals Nitrogen-Doped Hierarchical Porous Activated Carbon Derived from Paddy for High-Performance Supercapacitors

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 318
Author(s):  
Yudan Yuan ◽  
Yi Sun ◽  
Zhichen Feng ◽  
Xingjian Li ◽  
Ruowei Yi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Specific Capacitance ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Scale Production ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Porous Activated Carbon

A facile and environmentally friendly fabrication is proposed to prepare nitrogen-doped hierarchical porous activated carbon via normal-pressure popping, one-pot activation and nitrogen-doping process. The method adopts paddy as carbon precursor, KHCO3 and dicyandiamide as the safe activating agent and nitrogen dopant. The as-prepared activated carbon presents a large specific surface area of 3025 m2·g−1 resulting from the synergistic effect of KHCO3 and dicyandiamide. As an electrode material, it shows a maximum specific capacitance of 417 F·g−1 at a current density of 1 A·g−1 and very good rate performance. Furthermore, the assembled symmetric supercapacitor presents a large specific capacitance of 314.6 F·g−1 and a high energy density of 15.7 Wh·Kg−1 at 1 A·g−1, maintaining 14.4 Wh·Kg−1 even at 20 A·g−1 with the energy density retention of 91.7%. This research demonstrates that nitrogen-doped hierarchical porous activated carbon derived from paddy has a significant potential for developing a high-performance renewable supercapacitor and provides a new route for economical and large-scale production in supercapacitor application.

scholarly journals High-Energy and High-Power Pseudocapacitor–Battery Hybrid Sodium-Ion Capacitor with Na+ Intercalation Pseudocapacitance Anode

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Qiulong Wei ◽  
Qidong Li ◽  
Yalong Jiang ◽  
Yunlong Zhao ◽  
Shuangshuang Tan ◽  
...  
Keyword(s):  
Energy Density ◽  
High Power ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density

AbstractHigh-performance and low-cost sodium-ion capacitors (SICs) show tremendous potential applications in public transport and grid energy storage. However, conventional SICs are limited by the low specific capacity, poor rate capability, and low initial coulombic efficiency (ICE) of anode materials. Herein, we report layered iron vanadate (Fe5V15O39 (OH)9·9H2O) ultrathin nanosheets with a thickness of ~ 2.2 nm (FeVO UNSs) as a novel anode for rapid and reversible sodium-ion storage. According to in situ synchrotron X-ray diffractions and electrochemical analysis, the storage mechanism of FeVO UNSs anode is Na+ intercalation pseudocapacitance under a safe potential window. The FeVO UNSs anode delivers high ICE (93.86%), high reversible capacity (292 mAh g−1), excellent cycling stability, and remarkable rate capability. Furthermore, a pseudocapacitor–battery hybrid SIC (PBH-SIC) consisting of pseudocapacitor-type FeVO UNSs anode and battery-type Na3(VO)2(PO4)2F cathode is assembled with the elimination of presodiation treatments. The PBH-SIC involves faradaic reaction on both cathode and anode materials, delivering a high energy density of 126 Wh kg−1 at 91 W kg−1, a high power density of 7.6 kW kg−1 with an energy density of 43 Wh kg−1, and 9000 stable cycles. The tunable vanadate materials with high-performance Na+ intercalation pseudocapacitance provide a direction for developing next-generation high-energy capacitors.

Iron Oxide Encapsulated Titanium Niobate Nanotubes as High-Performance Lithium-Free Anode for Solid-State Batteries

2021 ◽  
Author(s):  
Wei Wu ◽  
Wang Lin ◽  
Hongjiang Chen ◽  
Keyan Wei ◽  
Zhitong Li ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Solid State ◽  
Energy Density ◽  
Anode Materials ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Solid State Batteries

The development of high-performance solid-state batteries (SSBs) that integrate high safety with high energy density has long been pursued. However, conventional lithium-containing anode materials are unable to balance these two...

scholarly journals Preparation of a NbN/graphene nanocomposite by solution impregnation and its application in high-performance Li-ion hybrid capacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 19967-19975 ◽  
Author(s):  
Zhen-Kun Chen ◽  
Jun-Wei Lang ◽  
Ling-Yang Liu ◽  
Ling-Bin Kong
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Graphene Nanocomposite ◽  
Li Ion ◽  
Hybrid Capacitors

Freestanding NbN/graphene papers were used in Li-ion hybrid capacitors and exhibit high energy density and power density.

Yolk–shell Nb2O5 microspheres as intercalation pseudocapacitive anode materials for high-energy Li-ion capacitors

2019 ◽  
Vol 7 (18) ◽  
pp. 11234-11240 ◽  
Author(s):  
Shida Fu ◽  
Qiang Yu ◽  
Zhenhui Liu ◽  
Ping Hu ◽  
Qiang Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Anode Materials ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
Lithium Ion Capacitor ◽  
Li Ion

Porous yolk–shell structured Nb2O5 enables a Nb2O5//activated carbon lithium-ion capacitor to exhibit superior energy density and cycling stability.

Non-polymeric hybridization of a TEMPO derivative with activated carbon for high-energy-density aqueous electrochemical capacitor electrodes

2018 ◽  
Vol 2 (3) ◽  
pp. 558-565 ◽  
Author(s):  
Hiroyuki Itoi ◽  
Hideyuki Hasegawa ◽  
Hiroyuki Iwata ◽  
Yoshimi Ohzawa
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
High Performance ◽  
Electrochemical Capacitor ◽  
High Energy ◽  
High Energy Density ◽  
High Dispersion

High-dispersion of a hydrophobic TEMPO derivative inside the pores of activated carbon provides high-performance aqueous electrochemical capacitor electrodes without polymerization.

Research progress regarding Si-based anode materials towards practical application in high energy density Li-ion batteries

2017 ◽  
Vol 1 (9) ◽  
pp. 1691-1708 ◽  
Author(s):  
Jin-Yi Li ◽  
Quan Xu ◽  
Ge Li ◽  
Ya-Xia Yin ◽  
Li-Jun Wan ◽  
...  
Keyword(s):  
Energy Density ◽  
Anode Materials ◽  
High Energy ◽  
High Energy Density ◽  
Research Progress ◽  
Li Ion Batteries ◽  
Practical Application ◽  
Practical Applications ◽  
Li Ion ◽  
Key Aspects

Key aspects of Si-based anode materials towards practical applications.

A high performance all-vanadate-based Li-ion full cell

2021 ◽  
Vol 9 (16) ◽  
pp. 10345-10353
Author(s):  
Jie Xu ◽  
Dongmei Zhang ◽  
Zongping Zhang ◽  
Shibing Ni
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Porous Microspheres ◽  
Full Cell ◽  
Excellent Electrochemical Performance ◽  
Li Ion ◽  
First Time

An all-vanadate-based Li-ion full cell with high energy density and long lifespan is constructed for the first time based on the design of Li3VO4/N doped C porous microspheres with excellent electrochemical performance.

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