Optimized Kinetics Match and Charge Balance Toward Potassium Ion Hybrid Capacitors with Ultrahigh Energy and Power Densities

Small ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 2003724
Author(s):  
Yufan Peng ◽  
Rui Zhang ◽  
Binbin Fan ◽  
Weijian Li ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Ultrahigh Energy ◽  
Charge Balance ◽  
Power Densities ◽  
Hybrid Capacitors

Interconnected 3D carbon network with enhanced reaction kinetics and architecture stability for advanced potassium-ion hybrid capacitors

2022 ◽  
Author(s):  
Bo Wang ◽  
Fei Yuan ◽  
Di Zhang ◽  
Qiyao Yu ◽  
Zhaojin Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Reaction Kinetics ◽  
Large Scale ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
Potassium Ion ◽  
Power Densities ◽  
Carbon Network ◽  
Hybrid Capacitors

Due to their high energy/power densities and ultralong cycle lifespan, potassium-ion hybrid capacitors (PIHCs) have attracted increasing research interest for large-scale energy storage system. However, the kinetics mismatch between battery-type...

Potassium Pre-Inserted K1.04Mn8O16 Cathode Materials for Aqueous Li-Ion and Na-Ion Hybrid Capacitors

2019 ◽  
Author(s):  
Yamin Zhang ◽  
Lina Chen ◽  
Chongyang Hao ◽  
Xiaowen Zheng ◽  
Yixuan Guo ◽  
...  
Keyword(s):  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Potassium Ions ◽  
Tunnel Structure ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Li Ion ◽  
Power Densities ◽  
Hybrid Capacitors

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors, potassium ions are pre-inserted into MnO<sub>2</sub> tunnel structure, the as-prepared K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16</sub> materials consist of <a>nanoparticles</a> and nanorods were prepared by facile high-temperature solid-state reaction. <a></a>The as-prepared materials were well studied andthey show outstanding electrochemical behavior. We assembled hybrid supercapacitors with commercial activated carbon (YEC-8A) as anode and K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16 </sub>as cathode. It has high energy densities and power densities. Li-ion capacitors reach a high energy density of 127.61 Wh kg<sup>-1 </sup>at the power density of 99.86 W kg<sup>-1</sup> and Na-ion capacitor obtains 170.96 Wh kg<sup>-1 </sup>at 133.79 W kg<sup>-1</sup>. In addition, the <a>hybrid supercapacitor</a>s demonstrate excellent cycling performance which maintain 97 % capacitance retention for Li-ion capacitor and 85 % for Na-ion capacitor after 10,000 cycles.

Graphene-wrapped and cobalt oxide-intercalated hybrid for extremely durable super-capacitor with ultrahigh energy and power densities

Carbon ◽  
2014 ◽  
Vol 79 ◽  
pp. 192-202 ◽  
Author(s):  
Rajesh Kumar ◽  
Hyun-Jun Kim ◽  
Sungjin Park ◽  
Anchal Srivastava ◽  
Il-Kwon Oh
Keyword(s):  
Cobalt Oxide ◽  
Ultrahigh Energy ◽  
Super Capacitor ◽  
Power Densities

Rational Construction of Nitrogen‐Doped Hierarchical Dual‐Carbon for Advanced Potassium‐Ion Hybrid Capacitors

2020 ◽  
Vol 10 (15) ◽  
pp. 1904045 ◽  
Author(s):  
Jiafeng Ruan ◽  
Fangjie Mo ◽  
Ziliang Chen ◽  
Miao Liu ◽  
Shiyou Zheng ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Nitrogen Doped ◽  
Rational Construction ◽  
Hybrid Capacitors

scholarly journals Dual-phase nanostructuring of layered metal oxides for high-performance aqueous rechargeable potassium ion microbatteries

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ying-Qi Li ◽  
Hang Shi ◽  
Sheng-Bo Wang ◽  
Yi-Tong Zhou ◽  
Zi Wen ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Electrical Power ◽  
Rate Capability ◽  
Interlayer Spacing ◽  
Potassium Ion ◽  
Dual Phase ◽  
Ultrahigh Energy ◽  
Practical Capacity ◽  
On Chip

Abstract Aqueous rechargeable microbatteries are promising on-chip micropower sources for a wide variety of miniaturized electronics. However, their development is plagued by state-of-the-art electrode materials due to low capacity and poor rate capability. Here we show that layered potassium vanadium oxides, KxV2O5·nH2O, have an amorphous/crystalline dual-phase nanostructure to show genuine potential as high-performance anode materials of aqueous rechargeable potassium-ion microbatteries. The dual-phase nanostructured KxV2O5·nH2O keeps large interlayer spacing while removing secondary-bound interlayer water to create sufficient channels and accommodation sites for hydrated potassium cations. This unique nanostructure facilitates accessibility/transport of guest hydrated potassium cations to significantly improve practical capacity and rate performance of the constituent KxV2O5·nH2O. The potassium-ion microbatteries with KxV2O5·nH2O anode and KxMnO2·nH2O cathode constructed on interdigital-patterned nanoporous metal current microcollectors exhibit ultrahigh energy density of 103 mWh cm−3 at electrical power comparable to carbon-based microsupercapacitors.

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