Alloy Negative Electrodes for High Energy Density Metal-Ion Cells

2011 ◽  
Vol 158 (12) ◽  
pp. A1411 ◽  
Author(s):  
Tuan T. Tran ◽  
M. N. Obrovac
Keyword(s):  
Energy Density ◽  
Metal Ion ◽  
High Energy ◽  
High Energy Density ◽  
Negative Electrodes

scholarly journals Binder-Free V2O5 Cathode for High Energy Density Rechargeable Aluminum-Ion Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 247 ◽  
Author(s):  
Diem ◽  
Fenk ◽  
Bill ◽  
Burghard
Keyword(s):  
Energy Density ◽  
Metal Ion ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Aluminum Ion ◽  
Future Design ◽  
Aluminum Ions ◽  
Binder Free

Nowadays, research on electrochemical storage systems moves into the direction of post-lithium-ion batteries, such as aluminum-ion batteries, and the exploration of suitable materials for such batteries. Vanadium pentoxide (V2O5) is one of the most promising host materials for the intercalation of multivalent ions. Here, we report on the fabrication of a binder-free and self-supporting V2O5 micrometer-thick paper-like electrode material and its use as the cathode for rechargeable aluminum-ion batteries. The electrical conductivity of the cathode was significantly improved by a novel in-situ and self-limiting copper migration approach into the V2O5 structure. This process takes advantage of the dissolution of Cu by the ionic liquid-based electrolyte, as well as the presence of two different accommodation sites in the nanostructured V2O5 available for aluminum-ions and the migrated Cu. Furthermore, the advanced nanostructured cathode delivered a specific discharge capacity of up to ~170 mAh g−1 and the reversible intercalation of Al3+ for more than 500 cycles with a high Coulomb efficiency reaching nearly 100%. The binder-free concept results in an energy density of 74 Wh kg−1, which shows improved energy density in comparison to the so far published V2O5-based cathodes. Our results provide valuable insights for the future design and development of novel binder-free and self-supporting electrodes for rechargeable multivalent metal-ion batteries associating a high energy density, cycling stability, safety and low cost.

The underestimated charge storage capability of carbon cathodes for advanced alkali metal-ion capacitors

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11445-11450 ◽  
Author(s):  
Hong Tan ◽  
Xiuyi Lin ◽  
Jianqiu Huang ◽  
Jiaqiang Huang ◽  
Maijia Shi ◽  
...  
Keyword(s):  
Energy Density ◽  
Alkali Metal ◽  
Metal Ion ◽  
High Energy ◽  
High Energy Density ◽  
Charge Storage ◽  
Alkali Metal Ion ◽  
Anions And Cations

The synergistic storage of anions and cations results in exceptionally high energy density.

scholarly journals A seamlessly integrated device of micro-supercapacitor and wireless charging with ultrahigh energy density and capacitance

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chang Gao ◽  
Jiancheng Huang ◽  
Yukun Xiao ◽  
Guoqiang Zhang ◽  
Chunlong Dai ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Efficiency ◽  
Metal Ion ◽  
High Energy ◽  
High Energy Density ◽  
Material System ◽  
Wireless Charging ◽  
Ultrahigh Energy ◽  
Circuit Structure ◽  
Integrated Device

AbstractMicrodevice integrating energy storage with wireless charging could create opportunities for electronics design, such as moveable charging. Herein, we report seamlessly integrated wireless charging micro-supercapacitors by taking advantage of a designed highly consistent material system that both wireless coils and electrodes are of the graphite paper. The transferring power efficiency of the wireless charging is 52.8%. Benefitting from unique circuit structure, the intact device displays low resistance and excellent voltage tolerability with a capacitance of 454.1 mF cm−2, superior to state-of-the-art conventional planar micro-supercapacitors. Besides, a record high energy density of 463.1 μWh cm−2 exceeds the existing metal ion hybrid micro-supercapacitors and even commercial thin film battery (350 μWh cm−2). After charging for 6 min, the integrated device reaches up to a power output of 45.9 mW, which can drive an electrical toy car immediately. This work brings an insight for contactless micro-electronics and flexible micro-robotics.

scholarly journals A Seamlessly Integrated Device of Micro-supercapacitor and Wireless Charging with Ultrahigh Energy Density and Capacitance

2020 ◽  
Author(s):  
Chang Gao ◽  
Jiancheng Huang ◽  
Yukun Xiao ◽  
Guoqiang Zhang ◽  
Chunlong Dai ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Efficiency ◽  
Metal Ion ◽  
High Energy ◽  
High Energy Density ◽  
Material System ◽  
Wireless Charging ◽  
Ultrahigh Energy ◽  
Circuit Structure ◽  
Integrated Device

Abstract Microdevice integrating energy storage with wireless charging could provide new opportunities for electronics design, such as moveable charging. Herein, we report a seamlessly integrated wireless charging micro-supercapacitors (IWC-MSCs) by taking advantage of a designed highly consistent material system that both wireless coil and electrode are of the graphite paper. The transferring power efficiency of the wireless charging is 52.8%. Benefitting from unique circuit structure, the intact IWC-MSCs displays low resistance and excellent voltage tolerability with a capacitance of 454.1 mF cm− 2, superior to state-of-the-art conventional planar MSCs. Besides, a record high energy density of 567.6 µWh cm− 2 exceeds the existing metal ion hybrid MSCs and even commercial thin film batteries (350 µWh cm− 2). After charging for 6 minutes, the IWC-MSCs reaches up to a power output of 4.5 mW, which can drive an electrical toy car immediately. The specific electrode layout brings new insight for contactless micro-electronics and flexible micro-robotics.

Low-cost and high energy density asymmetric supercapacitors based on polyaniline nanotubes and MoO3 nanobelts

2014 ◽  
Vol 2 (27) ◽  
pp. 10384-10388 ◽  
Author(s):  
Hui Peng ◽  
Guofu Ma ◽  
Jingjing Mu ◽  
Kanjun Sun ◽  
Ziqiang Lei
Keyword(s):  
Energy Density ◽  
Aqueous Electrolyte ◽  
Low Cost ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitors ◽  
Positive Electrodes ◽  
Negative Electrodes ◽  
Polyaniline Nanotubes

Asymmetric supercapacitors (ASCs) with high energy density are assembled based on the pseudocapacitance of both electrodes, which use polyaniline (PANI) nanotubes as positive electrodes and MoO3 nanobelts as negative electrodes in a 1 M H2SO4 aqueous electrolyte.

A high energy density asymmetric all-solid-state supercapacitor based on cobalt carbonate hydroxide nanowire covered N-doped graphene and porous graphene electrodes

2015 ◽  
Vol 3 (36) ◽  
pp. 18505-18513 ◽  
Author(s):  
Hao Xie ◽  
Shaochun Tang ◽  
Jian Zhu ◽  
Sascha Vongehr ◽  
Xiangkang Meng
Keyword(s):  
Solid State ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Porous Graphene ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Negative Electrodes ◽  
Doped Graphene

To achieve high energy densities, an asymmetric all-solid-state supercapacitor is developed with cobalt carbonate hydroxide (CCH) nanowire covered N-doped graphene (NG) as positive and porous NG as negative electrodes.

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