High‐Energy Aqueous Ammonium‐Ion Hybrid Supercapacitors

2021 ◽  
pp. 2107992
Author(s):  
Qiang Chen ◽  
Jialun Jin ◽  
Mengda Song ◽  
Xiangyong Zhang ◽  
Hang Li ◽  
...  
Keyword(s):  
High Energy ◽  
Ammonium Ion ◽  
Hybrid Supercapacitors

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.

scholarly journals In-Situ Annealed Ti3C2Tx MXene Based All-Solid-State Flexible Zn-Ion Hybrid Micro Supercapacitor Array with Enhanced Stability

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
La Li ◽  
Weijia Liu ◽  
Kai Jiang ◽  
Di Chen ◽  
Fengyu Qu ◽  
...  
Keyword(s):  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Electrochemical Performances ◽  
Integrated Electronics ◽  
Long Term Stability ◽  
Hybrid Supercapacitors ◽  
Portable Electronics

AbstractZn-ion hybrid supercapacitors (SCs) are considered as promising energy storage owing to their high energy density compared to traditional SCs. How to realize the miniaturization, patterning, and flexibility of the Zn-ion SCs without affecting the electrochemical performances has special meanings for expanding their applications in wearable integrated electronics. Ti3C2Tx cathode with outstanding conductivity, unique lamellar structure and good mechanical flexibility has been demonstrated tremendous potential in the design of Zn-ion SCs, but achieving long cycling stability and high rate stability is still big challenges. Here, we proposed a facile laser writing approach to fabricate patterned Ti3C2Tx-based Zn-ion micro-supercapacitors (MSCs), followed by the in-situ anneal treatment of the assembled MSCs to improve the long-term stability, which exhibits 80% of the capacitance retention even after 50,000 charge/discharge cycles and superior rate stability. The influence of the cathode thickness on the electrochemical performance of the MSCs is also studied. When the thickness reaches 0.851 µm the maximum areal capacitance of 72.02 mF cm−2 at scan rate of 10 mV s−1, which is 1.77 times higher than that with a thickness of 0.329 µm (35.6 mF cm−2). Moreover, the fabricated Ti3C2Tx based Zn-ion MSCs have excellent flexibility, a digital timer can be driven by the single device even under bending state, a flexible LED displayer of “TiC” logo also can be easily lighted by the MSC arrays under twisting, crimping, and winding conditions, demonstrating the scalable fabrication and application of the fabricated MSCs in portable electronics.

Heterostructures of Ni–Co–Al layered double hydroxide assembled on V4C3MXene for high-energy hybrid supercapacitors

2019 ◽  
Vol 7 (5) ◽  
pp. 2291-2300 ◽  
Author(s):  
Xin Wang ◽  
Hui Li ◽  
Han Li ◽  
Shuai Lin ◽  
Jin Bai ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
High Energy ◽  
Hybrid Supercapacitor ◽  
Synthetic Process ◽  
Hybrid Supercapacitors ◽  
Double Hydroxide

The synthetic process of the NiCoAl-LDH/V4C3Txcomposite and the assembled NiCoAl-LDH/V4C3Tx//AC hybrid supercapacitor device.

Hierarchically designed 3D Cu3N@Ni3N porous nanorod arrays: An efficient and robust electrode for high-energy solid-state hybrid supercapacitors

2021 ◽  
Vol 22 ◽  
pp. 100951
Author(s):  
Pragati A. Shinde ◽  
Sehong Park ◽  
Nilesh R. Chodankar ◽  
Sewon Park ◽  
Young-Kyu Han ◽  
...  
Keyword(s):  
Solid State ◽  
High Energy ◽  
Nanorod Arrays ◽  
Hybrid Supercapacitors

A core–shell structure of cobalt sulfide//G-ink towards high energy density in asymmetric hybrid supercapacitors

2020 ◽  
Vol 4 (9) ◽  
pp. 4848-4858
Author(s):  
Venkata Thulasivarma Chebrolu ◽  
Balamuralitharan Balakrishnan ◽  
Aravindha Raja Selvaraj ◽  
Hee-Je Kim
Keyword(s):  
Energy Density ◽  
Shell Structure ◽  
High Energy ◽  
High Energy Density ◽  
Cobalt Sulfide ◽  
Core Shell ◽  
Hybrid Supercapacitors ◽  
Promising Strategy ◽  
Asymmetric Hybrid ◽  
Core Shell Structure

New atom substitution in transition metals is a promising strategy for improving the performance of supercapacitors (SCs).

A systematic approach to achieve high energy density hybrid supercapacitors based on Ni–Co–Fe hydroxide

2020 ◽  
Vol 353 ◽  
pp. 136578
Author(s):  
Su Chan Lee ◽  
Shude Liu ◽  
Pragati A. Shinde ◽  
Kyung Yoon Chung ◽  
Seong Chan Jun
Keyword(s):  
Energy Density ◽  
Systematic Approach ◽  
High Energy ◽  
High Energy Density ◽  
Hybrid Supercapacitors ◽  
Fe Hydroxide

Rational Design of Hierarchical CoS2/CuCo2S4 for Three-dimensional All-Solid-State Hybrid Supercapacitors with High Energy Density, Rate Efficiency and Operational Stability

2021 ◽  
Author(s):  
Yogesh Kumar Sonia ◽  
Mahesh Kumar Paliwal ◽  
Sumanta Kumar Meher
Keyword(s):  
Solid State ◽  
Rational Design ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Superior Performance ◽  
Exchange Method ◽  
Hybrid Supercapacitors ◽  
Storage Energy ◽  
Density Rate

In the context to develop superior-performance all-solid-state hybrid supercapacitor devices, with excellent charge storage, energy & power density, working stability and rate efficiency, herein we have adopted an anion-exchange method...

scholarly journals Electrode Materials for Supercapacitors: A Review of Recent Advances

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 969
Author(s):  
Parnia Forouzandeh ◽  
Vignesh Kumaravel ◽  
Suresh C. Pillai
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
Electronic Device ◽  
High Energy ◽  
High Energy Density ◽  
Storage Mechanism ◽  
Hybrid Supercapacitors ◽  
Discharge Rates ◽  
Redox Active

The advanced electrochemical properties, such as high energy density, fast charge–discharge rates, excellent cyclic stability, and specific capacitance, make supercapacitor a fascinating electronic device. During recent decades, a significant amount of research has been dedicated to enhancing the electrochemical performance of the supercapacitors through the development of novel electrode materials. In addition to highlighting the charge storage mechanism of the three main categories of supercapacitors, including the electric double-layer capacitors (EDLCs), pseudocapacitors, and the hybrid supercapacitors, this review describes the insights of the recent electrode materials (including, carbon-based materials, metal oxide/hydroxide-based materials, and conducting polymer-based materials, 2D materials). The nanocomposites offer larger SSA, shorter ion/electron diffusion paths, thus improving the specific capacitance of supercapacitors (SCs). Besides, the incorporation of the redox-active small molecules and bio-derived functional groups displayed a significant effect on the electrochemical properties of electrode materials. These advanced properties provide a vast range of potential for the electrode materials to be utilized in different applications such as in wearable/portable/electronic devices such as all-solid-state supercapacitors, transparent/flexible supercapacitors, and asymmetric hybrid supercapacitors.

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