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.

Carbon-Coated Porous Aluminum Foil Anode for High-Rate, Long-Term Cycling Stability, and High Energy Density Dual-Ion Batteries

2016 ◽  
Vol 28 (45) ◽  
pp. 9979-9985 ◽  
Author(s):  
Xuefeng Tong ◽  
Fan Zhang ◽  
Bifa Ji ◽  
Maohua Sheng ◽  
Yongbing Tang
Keyword(s):  
Energy Density ◽  
Aluminum Foil ◽  
High Energy ◽  
Cycling Stability ◽  
High Rate ◽  
High Energy Density ◽  
Porous Aluminum ◽  
Carbon Coated

Bread-inspired foaming strategy to fabricate a wine lees-based porous carbon framework for high specific energy supercapacitors

2021 ◽  
Vol 5 (19) ◽  
pp. 4965-4972
Author(s):  
Hui Peng ◽  
Yipu Xu ◽  
Yaping Jiang ◽  
Xin Wang ◽  
Rui Zhao ◽  
...  
Keyword(s):  
Energy Density ◽  
Porous Carbon ◽  
Fermentation Process ◽  
High Energy ◽  
High Energy Density ◽  
Long Term Stability ◽  
Carbon Framework ◽  
One Step ◽  
High Specific Energy

Inspired by the fermentation process of bread, a novel wine lees-based porous carbon framework (WLCF) having high energy density and excellent long-term stability is prepared via one-step sodium bicarbonate foaming and activation strategy.

scholarly journals Chemical Coupled PEDOT:PSS/Si Electrode: Suppressed Electrolyte Consumption Enables Long-Term Stability

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Xuejiao Liu ◽  
Zhixin Xu ◽  
Asma Iqbal ◽  
Ming Chen ◽  
Nazakat Ali ◽  
...  
Keyword(s):  
Energy Density ◽  
Solid Electrolyte Interphase ◽  
Rate Capability ◽  
High Energy ◽  
High Energy Density ◽  
Volume Changes ◽  
Etching Depth ◽  
Long Term Stability ◽  
Depth Analysis

AbstractHuge volume changes of Si during lithiation/delithiation lead to regeneration of solid-electrolyte interphase (SEI) and consume electrolyte. In this article, γ-glycidoxypropyl trimethoxysilane (GOPS) was incorporated in Si/PEDOT:PSS electrodes to construct a flexible and conductive artificial SEI, effectively suppressing the consumption of electrolyte. The optimized electrode can maintain 1000 mAh g−1 for nearly 800 cycles under limited electrolyte compared with 40 cycles of the electrodes without GOPS. Also, the optimized electrode exhibits excellent rate capability. The use of GOPS greatly improves the interface compatibility between Si and PEDOT:PSS. XPS Ar+ etching depth analysis proved that the addition of GOPS is conducive to forming a more stable SEI. A full battery assembled with NCM 523 cathode delivers a high energy density of 520 Wh kg−1, offering good stability.

Electronic modulation of nickel selenide by copper doping and in situ carbon coating towards high-rate and high-energy density lithium ion half/full batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23645-23652
Author(s):  
Jingrui Shang ◽  
Huilong Dong ◽  
Hongbo Geng ◽  
Binbin Cao ◽  
Haidong Liu ◽  
...  
Keyword(s):  
Carbon Coating ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Ion Transfer ◽  
Copper Doping ◽  
High Reversible Capacity

Copper doping and in situ carbon coating of nickel selenide composites with rapid electron/ion transfer kinetics manifest greatly boosted electrochemical performance in terms of high reversible capacity, stable cycling and good rate performances.

Urchin-like NiCo2O4 hollow microspheres and FeSe2 micro-snowflakes for flexible solid-state asymmetric supercapacitors

2017 ◽  
Vol 5 (11) ◽  
pp. 5568-5576 ◽  
Author(s):  
Chenchen Ji ◽  
Fuzhu Liu ◽  
Liang Xu ◽  
Shengchun Yang
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Cathode Material ◽  
Hollow Structure ◽  
High Energy ◽  
Hollow Microspheres ◽  
High Energy Density ◽  
Asymmetric Supercapacitors ◽  
Long Term Stability

FSASCs were designed using a NiCo2O4 cathode material with an urchin-like hollow structure and a FeSe2 anode with a hierarchical snowflake structure, which exhibit satisfactory performances with excellent flexibility, high energy density, and long-term stability.

High energy density hybrid supercapacitors derived from novel Ni3Se2 nanowires in situ constructed on porous nickel foam

2021 ◽  
Author(s):  
Wei Li ◽  
Tianqi Chen ◽  
Ao Li ◽  
Peng Shi ◽  
Ming Wu ◽  
...  
Keyword(s):  
Reaction Time ◽  
Hydrothermal Reaction ◽  
Nickel Foam ◽  
High Energy ◽  
High Energy Density ◽  
Porous Nickel ◽  
Hybrid Supercapacitors ◽  
Storage Performance ◽  
One Step

A novel Ni3Se2 nanowires are synthesized in situ on the surface of nickel foam through a one-step hydrothermal reaction under the reaction time of 24 h, and it demonstrates excellent energy storage performance for hybrid supercapacitors.

scholarly journals Facile synthesis of Al-doped NiO nanosheet arrays for high-performance supercapacitors

2018 ◽  
Vol 5 (11) ◽  
pp. 180842 ◽  
Author(s):  
Jinping Chen ◽  
Xianyun Peng ◽  
Lida Song ◽  
Lihan Zhang ◽  
Xijun Liu ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Rate Capability ◽  
Material Design ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Electrochemical Performances ◽  
Multiwalled Carbon ◽  
Nanosheet Arrays

Electrode material design is the key to the development of asymmetric supercapacitors with high electrochemical performances and stability. In this work, Al-doped NiO nanosheet arrays were synthesized using a facile hydrothermal method followed by a calcination process, and the synthesized arrays exhibited a superior pseudocapacitive performance, including a favourable specific capacitance of 2253 ± 105 F g −1 at a current density of 1 A g −1 , larger than that of an undoped NiO electrode (1538 ± 80 F g −1 ). More importantly, the arrays showed a high-rate capability (75% capacitance retention at 20 A g −1 ) and a high cycling stability (approx. 99% maintained after 5000 cycles). The above efficient capacitive performance benefits from the large electrochemically active area and enhanced conductivity of the arrays. Furthermore, an assembled asymmetric supercapacitor based on the Al-doped NiO arrays and N-doped multiwalled carbon nanotube ones delivered a high specific capacitance of 192 ± 23 F g −1 at 0.4 A g −1 with a high-energy density of 215 ± 15 Wh kg −1 and power density of 21.6 kW kg −1 . Additionally, the asymmetric device exhibited a durable cyclic stability (approx. 100% retention after 5000 cycles). This work with the proposed doping method will be beneficial to the construction of high-performance supercapacitor systems.

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