A novel binder-free electrode of graphene film upon intercalation of hollow MoS2 spheres for enhanced supercapacitor performance

An electrode based on hollow MoS2 spheres intercalated graphene film was firstly fabricated. When used as an electrode in a supercapacitor, the unique structure can provide electrically conducting channels to promote electrolyte penetration and utilize their surface as much as possible. Thus, the resultant binder-free electrode demonstrated a high specific capacity of 286.8[Formula: see text]F[Formula: see text]g[Formula: see text] more than 2 times of pure MoS2 hollow spheres (116.4[Formula: see text]F[Formula: see text]g[Formula: see text]. A supercapacitor based on MoS2/grapheme and active carbon can achieve a maximum energy density of 22.0[Formula: see text]W h[Formula: see text]kg[Formula: see text] at 800[Formula: see text]W[Formula: see text]kg[Formula: see text]. The outstanding electrochemical properties of the hybrid electrode demonstrate that it holds great potential for the next-generation energy storage applications.

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Improving the Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Cathodes Using a Simple Ce4+-doping and CeO2-coating technique

New Journal of Chemistry ◽

10.1039/d1nj04997f ◽

2021 ◽

Author(s):

yanhua feng ◽

xiangxin zhang ◽

changxin lin ◽

qichao wang ◽

Yining Zhang

Keyword(s):

Energy Density ◽

Electrochemical Performance ◽

Specific Capacity ◽

Structural Instability ◽

High Specific Capacity ◽

Coating Technique ◽

Ceo2 Coating

LiNixCoyMn1-x-yO2 (x≥0.6, NCM) has attracted much attention due to its high specific capacity and energy density. However, capacity attenuation caused by Li+/Ni2+ mixing and structural instability inhibit its development and...

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Rapid microwave-assisted synthesis of high-rate FeS2 nanoparticles anchored on graphene for hybrid supercapacitors with ultrahigh energy density

Journal of Materials Chemistry A ◽

10.1039/c8ta05818k ◽

2018 ◽

Vol 6 (30) ◽

pp. 14956-14966 ◽

Cited By ~ 36

Author(s):

Zhiqin Sun ◽

Huiming Lin ◽

Feng Zhang ◽

Xue Yang ◽

He Jiang ◽

...

Keyword(s):

Solid State ◽

Energy Density ◽

Specific Capacity ◽

High Rate ◽

Microwave Assisted Synthesis ◽

Ultrahigh Energy ◽

Hybrid Supercapacitor ◽

High Specific Capacity ◽

Hybrid Supercapacitors ◽

Microwave Assisted

Benefitting from the high specific capacity (793 C g−1) of the FeS2/graphene anode, an assembled all-solid-state hybrid supercapacitor device based on the FeS2/graphene anode and a Ni(OH)2@Co9S8 cathode achieves an ultrahigh energy density of up to 95.8 W h kg−1 at a power density of 949 W kg−1.

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Recent advances in cathode materials for rechargeable lithium–sulfur batteries

Nanoscale ◽

10.1039/c9nr04415a ◽

2019 ◽

Vol 11 (33) ◽

pp. 15418-15439 ◽

Cited By ~ 41

Author(s):

Fang Li ◽

Quanhui Liu ◽

Jiawen Hu ◽

Yuezhan Feng ◽

Pengbin He ◽

...

Keyword(s):

Energy Storage ◽

Energy Density ◽

Cathode Materials ◽

Storage Systems ◽

Low Cost ◽

Specific Capacity ◽

Promising Candidate ◽

High Specific Capacity ◽

Lithium Sulfur Batteries ◽

Lithium Sulfur

Li–S batteries are regarded as a promising candidate for next-generation energy storage systems due to their high specific capacity (1675 mA h g−1) and energy density (2600 W h kg−1) as well as the abundance, safety and low cost of S material.

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Janus behaviour of LiFSI- and LiPF6-based electrolytes for Li metal batteries: chemical corrosion versus galvanic corrosion

Journal of Materials Chemistry A ◽

10.1039/d1ta07860g ◽

2021 ◽

Author(s):

Bomee Kwon ◽

Jeonghyeop Lee ◽

Hyunchul Kim ◽

Dong-min Kim ◽

Kyobin Park ◽

...

Keyword(s):

Energy Density ◽

Redox Potential ◽

Galvanic Corrosion ◽

Specific Capacity ◽

High Energy ◽

Redox Couple ◽

High Energy Density ◽

High Specific Capacity ◽

Chemical Corrosion ◽

Li Batteries

Li metal has been considered a promising anode for high energy density Li batteries because of the lowest redox potential and high specific capacity of the Li/Li+ redox couple. However,...

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Achieving high specific capacity of lithium-ion battery cathodes by modification with “N–O˙” radicals and oxygen-containing functional groups

Journal of Materials Chemistry A ◽

10.1039/c7ta08688a ◽

2017 ◽

Vol 5 (47) ◽

pp. 24636-24644 ◽

Cited By ~ 5

Author(s):

Chengyi Lu ◽

David W. Rooney ◽

Xiong Jiang ◽

Wang Sun ◽

Zhenhua Wang ◽

...

Keyword(s):

Energy Density ◽

Lithium Ion Batteries ◽

Lithium Ion Battery ◽

Electric Vehicle ◽

Functional Groups ◽

Specific Capacity ◽

Lithium Ion ◽

High Specific Capacity

Enhancing the cathode capacity of lithium ion batteries (LIBs) has been one strategy to improve the energy density of batteries for electric vehicle applications, because of the limitation of inorganic cathode capacity.

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Facile Hydrothermal Synthesis and Supercapacitor Performance of Mesoporous Necklace-Type ZnCo2O4 Nanowires

Catalysts ◽

10.3390/catal11121516 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1516

Author(s):

John Anthuvan Rajesh ◽

Kwang-Soon Ahn

Keyword(s):

Surface Area ◽

High Surface ◽

Specific Capacity ◽

High Surface Area ◽

Negative Electrode ◽

Building Blocks ◽

High Specific Capacity ◽

Supercapacitor Performance ◽

Subsequent Calcination ◽

Excellent Stability

In this work, mesoporous ZnCo2O4 electrode material with necklace-type nanowires was synthesized by a simple hydrothermal method using water/ethylene glycol mixed solvent and subsequent calcination treatment. The ZnCo2O4 nanowires were assembled by several tiny building blocks of nanoparticles which led to the growth of necklace-type nanowires. The as-synthesized ZnCo2O4 nanowires had porous structures with a high surface area of 25.33 m2 g−1 and with an average mesopore of 23.13 nm. Due to the higher surface area and mesopores, the as-prepared necklace-type ZnCo2O4 nanowires delivered a high specific capacity of 439.6 C g−1 (1099 F g−1) at a current density of 1 A g−1, decent rate performance (47.31% retention at 20 A g−1), and good cyclic stability (84.82 % capacity retention after 5000 cycles). Moreover, a hybrid supercapacitor was fabricated with ZnCo2O4 nanowires as a positive electrode and activated carbon (AC) as a negative electrode (ZnCo2O4 nanowires//AC), which delivered an energy density of 41.87 Wh kg−1 at a power density of 800 W kg−1. The high electrochemical performance and excellent stability of the necklace-type ZnCo2O4 nanowires relate to their unique architecture, high surface area, mesoporous nature, and the synergistic effect between Zn and Co metals.

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