High reversible capacity and rate capability of ZnCo 2 O 4 /graphene nanocomposite anode for high performance lithium ion batteries

Kumar, Alok; Kim, Jaekook

doi:10.1016/j.solidstatesciences.2015.07.009

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…Structural analysis of ZnCo 2 O 4 .-X-ray diffraction analysis was done using an X-ray diffractometer with Cu K α radiation (λ = 0.1546 nm) source of wavelength of X-rays. 35 The crystallite size of each diffraction peak was calculated by using Debye-Scherrer Eq. 2 36,37 and is tabulated in Table I.…”

Section: Resultsmentioning

confidence: 99%

Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Singh

Verma

et al. 2023

ECS J. Solid State Sci. Technol.

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Even if there is a market for specifically designed ammonia sensors, room-temperature and long-term stable detection of low trace airborne ammonia represent a serious challenge that calls for immediate alternatives. This communication reports single-step hydrothermally engineered ZnCo2O4 nanoflakes for developing energy-efficient and economic ammonia-detecting chemiresistor. The formation of found nanoflakes structure with hole-like morphology was observed through scanning electron microscopy. X-ray diffraction results show the crystal structure of ZnCo2O4 to be of cubic phase and Fd-3m space group. Optical absorbance analysis exhibits the optical band gap of the ZnCo2O4 nanoflakes to be 2.71 eV. Further, a chemi-resistor was fabricated and used as an ambient room-temperature ammonia sensor. The sensor exhibits a superior sensing response of around 34.13 for 30 ppm of ammonia, whereas at 5 ppm the sensor shows a response of 3.49 with prompt response and recovery times of 1.52 and 2.12 seconds, respectively. The fabricated chemiresistor demonstrated excellent sensing performance in terms of selectivity, stability and sensitivity and recovery, response, range, room temperature operation, and repeatability. The enhanced sensing performance in an energy-efficient module is attributed to nanoflakes morphology of engineered ZnCo2O4 with a high surface area and its stable crystal structure.

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Section: Resultsmentioning

confidence: 99%

Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Singh

Verma

et al. 2023

ECS J. Solid State Sci. Technol.

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“…The ZnCo 2 O 4 /graphene exhibited the improved cyclability and rate performance (Figure 9d and e), it could deliver a high reversible capacity of 755.6 mAh g À 1 after 70 cycles and 378.1 mAh g À 1 at 4.5 C, then the pristine ZnCo 2 O 4 nanoparticles only released the capacity of 299.8 mAh g À 1 after 70 cycles and 302.4 mAh g À 1 at 4.5 C. The improved electrochemical properties of ZnCo 2 O 4 /graphene should be attributed to the effective synergy of the ZnCo 2 O 4 nanoparticles and graphene nanosheets. Moreover, they also fabricated the ZnCo 2 O 4 /graphene nanocomposite by another method, [87] they firstly prepared pristine ZnCo 2 O 4 using a urea-assisted auto-combustion preparation, and then adopted a high energy spex mill strategy to obtain the ZnCo 2 O 4 /graphene nanocomposite. By this simple mechanical mixing strategy, the ZnCo 2 O 4 nanoparticles also could be uniformly dispersed and anchored on the surface of reduced graphene nanosheets.…”

Section: Modified With Carbonaceous Materialsmentioning

confidence: 99%

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

Han

Zou

Wei

2022

Chemistry An Asian Journal

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ZnCo2O4 has been attracted wide research attention as a promising anode material for lithium‐ion batteries (LIBs) in recent years based on its high theoretical specific capacity, low toxicity as well as stable chemical properties. However, the further large‐scale application of pristine ZnCo2O4 anode have been impeded because of its undesirable Li+ ion conductivity, low electronic conductivity, and finite stability of electrolytes at high potentials. Recently, optimizing the micro/nano structure, modification with carbonaceous materials, incorporation with metal oxides and constructing a binder‐free structure on conductive substrate for ZnCo2O4‐based materials have been verified as promising effective routes for solving the above problems. In this review, the recent advances in underlying reaction mechanisms, synthetic methods and strategies for improving the performance of ZnCo2O4 anodes are comprehensively summarized. The factors affecting the electrochemical properties of ZnCo2O4‐based materials are mainly discussed, and paths to promote the specific capacity and cyclic stability are proposed. Finally, several insights into the future developments, challenges, and prospects of ZnCo2O4‐based anode materials of LIBs are proposed.

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“…However, the use of ZnCo 2 O 4 in high power LIBs is restricted which can be ascribed to the poor electrical conductivity and slow lithium ion diffusivity. 18,19 More seriously, like other MTMO anode materials, ZnCo 2 O 4 also suffers from a very problematic disadvantage of a short cycling life owing to pulverization, caused by a huge volume variation during the repeated charge/discharge processes. 20,21 Fortunately, smart design of nanostructured MTMOs has been regarded as a successful means to overcome the electron/ ion diffusivity limitations by shortening the diffusion path.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of interconnected mesoporous ZnCo₂O₄ nanosheets on a 3D graphene foam as a binder-free anode for high-performance Li-ion batteries

et al. 2018

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High reversible capacity and rate capability of ZnCo 2 O 4 /graphene nanocomposite anode for high performance lithium ion batteries

Cited by 10 publications

References 37 publications

Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

Synthesis of interconnected mesoporous ZnCo₂O₄ nanosheets on a 3D graphene foam as a binder-free anode for high-performance Li-ion batteries

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High reversible capacity and rate capability of ZnCo 2 O 4 /graphene nanocomposite anode for high performance lithium ion batteries

Cited by 10 publications

References 37 publications

Economic ZnCo2O4 Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Economic ZnCo2O4 Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Recent Advances of ZnCo2O4‐based Anode Materials for Li‐ion Batteries

Synthesis of interconnected mesoporous ZnCo2O4 nanosheets on a 3D graphene foam as a binder-free anode for high-performance Li-ion batteries

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Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Economic ZnCo₂O₄ Nanoflakes Chemiresistor Assisted Room-Temperature Monitoring of Low Trace Airborne Ammonia

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

Synthesis of interconnected mesoporous ZnCo₂O₄ nanosheets on a 3D graphene foam as a binder-free anode for high-performance Li-ion batteries