Q1 Research Application · Frontier Focus

Microwave irradiation synthesis of Co3O4quantum dots/graphene composite as anode materials for Li-ion battery

This ElectrochimicaActa paper (2014) is indexed as a Xianghu equipment application case for XH-MC-1; key result: Capacitance 1438.2 mAh g-1.

View DOI Back to Library Chinese Solution
Paper ID 367
Application Focus Microwave-irradiation synthesis, Co3O4 quantum dots, Graphene, Lithium-ion battery, Anode material, Interfacial lithium storage
Key Result Capacitance 1438.2 mAh g-1
Core Condition Microwave power 500 W
Paper ID
367
Journal
ElectrochimicaActa
Impact Factor
6.215
CAS Zone
Zone 1
Year
2014
DOI
10.1016/j.electacta.2014.08.023
Equipment Model
XH-MC-1
Affiliations
Zhejiang Normal University; Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China
Research Directions
Microwave-irradiation synthesis Co3O4 quantum dots Graphene Lithium-ion battery Anode material Interfacial lithium storage

Fact Snapshot

  • Paper: Microwave irradiation synthesis of Co3O4quantum dots/graphene composite as anode materials for Li-ion battery
  • Equipment: XH-MC-1
  • Source: ElectrochimicaActa, 2014
  • Research direction: microwave-irradiation synthesis, Co3O4 quantum dots, graphene, and lithium-ion battery
  • Core conditions: Microwave power 500 W, Temperature 200°C / 450°C / 81°C, and Time 30 min / 3 h / 10 min
  • Key results: Second-cycle discharge capacity 1438.2 mAh g-1, Reversible capacity 1785 mAh g-1, Reversible capacity 485 mAh g-1, and Coulombic efficiency 84%

Research Abstract

Microwave irradiation synthesis of Co3O4quantum dots/graphene composite as anode materials for Li-ion battery was published in ElectrochimicaActa (2014) and is indexed as a Xianghu Q1 application case for XH-MC-1. The source record connects it with microwave-irradiation synthesis, Co3O4 quantum dots, graphene, and lithium-ion battery. Core operating conditions include Microwave power 500 W, Temperature 200°C / 450°C / 81°C, and Time 30 min / 3 h / 10 min. Key reported results include Second-cycle discharge capacity 1438.2 mAh g-1, Reversible capacity 1785 mAh g-1, Reversible capacity 485 mAh g-1, and Coulombic efficiency 84%.

Research Background and Problem

The paper is positioned around Co₃O₄. The equipment record identifies XH-MC-1 as the Xianghu instrument context for this application case. The source affiliation record includes Zhejiang Normal University and Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China.

Equipment Use and Experimental Conditions

ItemParameter
Microwave power500 W
Temperature200°C / 450°C / 81°C
Time30 min / 3 h / 10 min

Key Result

Capacitance 1438.2 mAh g-1
Reversible capacity 1785 mAh g-1
Reversible capacity 485 mAh g-1
Coulombic efficiency 84%
MetricResult
Capacitance1438.2 mAh g-1
Reversible capacity1785 mAh g-1
Reversible capacity485 mAh g-1
Coulombic efficiency84%
Reversible capacity1002 mAh g-1
Cutoff voltage0.005 V

Evidence Details

Ultrasonic-method evidence

Ultrasonic-method evidence: source values include 69 mg, 20 mL, 30 mL, 30 min, 1 g, 4H, 5 mL, 25%, 10 min, 81°C, 5 min, 500 W, 60°C. Entities: XH-MC-1.

Additional source evidence

Additional source evidence: source values include 75%, 10%, 15%, 80°C, 6 h, 1:1.

Additional source evidence

Additional source evidence: source values include 200°C, 30 min, 450°C, 3 h.

Microwave-method evidence

Microwave-method evidence: source values include 81°C, 5 min, 3–8 nm.

Additional source evidence

Additional source evidence: source values include 3–8 nm, 4–6 nm, 0.216 nm.

Additional source evidence

Additional source evidence: source values include 10 °C, 30°C, 800°C.

Stability evidence

Stability evidence: source values include 84%, 96%.

Composition evidence

Composition evidence: source values include 3–8 nm, 1000fold.

Additional source evidence

Additional source evidence: source values include 60%, 40%.

Mechanism / Method Highlights

  • The 3-8 nm Co3O4 quantum dots provide quantum and size effects, buffer volume change during lithiation/delithiation, and shorten Li-ion diffusion length. The well-dispersed Co3O4 quantum dots on graphene create large interfacial area and additional interfacial lithium-storage contribution. Flexible conductive graphene nanosheets accommodate mechanical stress from Co3O4 volume change, inhibit quantum-dot aggregation, and support fast electron transport. The electrocatalytic effect of Co3O4 quantum dots and generated Co nanoparticles may promote reversible conversion of some SEI components. During cycling, crystalline metal oxide gradually transforms into an amorphous phase, exposing more accessible active sites for lithium insertion. Microwave irradiation greatly accelerates chemical reaction rates compared with conventional heating, enabling rapid and uniform synthesis.

Application Value

  • With XH-MC-1, the Co3O4 quantum-dot/graphene composite is synthesized at 500 W and 81 °C in only 5 min.
  • Preserves quantitative result evidence: Second-cycle discharge capacity 1438.2 mAh g-1, Reversible capacity 1785 mAh g-1, Reversible capacity 485 mAh g-1, and Coulombic efficiency 84%.
  • Maintains source-level evidence details: Ultrasonic-method evidence: source values include 69 mg, 20 mL, 30 mL, 30 min, 1 g, 4H, 5 mL, 25%, 10 min, 81°C, 5 min, 500 W, 60°C. Entities: XH-MC-1, Additional source evidence: source values include 75%, 10%, 15%, 80°C, 6 h, 1:1, Additional source evidence: source values include 200°C, 30 min, 450°C, 3 h, and Microwave-method evidence: source values include 81°C, 5 min, 3–8 nm.

Related Equipment

XH-MC-1 Laboratory Microwave Synthesis Reactor
XH-MC-1 Laboratory Microwave Synthesis Reactor

FAQ

Which Xianghu instrument is covered by this page?
The structured source records XH-MC-1 for this paper.
What is the main application direction?
The source tags this paper under Co₃O₄.
Which publication does this case come from?
It comes from ElectrochimicaActa (2014), DOI 10.1016/j.electacta.2014.08.023.
Citation
Microwave irradiation synthesis of Co3O4quantum dots/graphene composite as anode materials for Li-ion battery
ElectrochimicaActa, 2014
DOI: 10.1016/j.electacta.2014.08.023