Novel modified nano-activated carbon and its influence on the metal–O2 battery system

Palanisamy, Siva; Shyma, Arunkumar Prabhakaran; Surendhiran, S.; Rajendran, V.

doi:10.1016/j.est.2019.02.006

Cited by 12 publications

(6 citation statements)

References 44 publications

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“…5, BAC05, BAC07, and BAC12 adsorbents exhibit a broader diffraction peak around 2θ = 22.5°a scribed to typical crystalline {002} plane, indicating the presence of disordered graphite-like carbon structure (Zhang et al 2019a graphite {104}, {301}, {100}, {102}, and {103} planes, respectively. This phenomenon reveals that the prepared adsorbents contain graphitic carbon structure (Palanisamy et al 2019). Generally, the strength of XRD peak is relevant to the crystal crystallinity; the stronger the XRD peak is, the better the crystallinity is (Zhou et al 2015).…”

Section: Xrd and Raman Spectra Characterizationmentioning

confidence: 88%

Control of pore structure and surface chemistry of activated carbon derived from waste Zanthoxylum bungeanum branches for toluene removal in air

Lei

Xie

Chen

et al. 2020

Environ Sci Pollut Res

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Activated carbon adsorption has been considered the most efficient technology toward VOC removal. The waste biomass as alternates solved the problems of high price and nonrenewable of traditional raw materials. The waste Zanthoxylum bungeanum branches were firstly selected as raw materials to prepare activated carbons. Interestingly, the pore structure and surface chemistry can be successfully controlled by adjusting the heating rate. The hierarchical porous carbons exhibited great potential for toluene adsorption. The micro-mesopore structure possessed unique spatial effect; micropores played a dominant role in adsorption process, especially narrow micropores (pore size ≤ 1.0 nm) emerged stronger adsorptive force toward toluene molecules due to overlapping attractive forces from neighboring pore walls. And mesopores not only displayed excellent transport diffusion but also provided adsorption sites. Additionally, the high graphitization degree enhanced the interaction between graphene layer equipped electron-rich regions and π-electrons on the aromatic ring by the π-π conjugated effect. The hydroxyl and carbonyl functional groups served as chemisorption sites and led to higher adsorption amounts. Fortunately, the regeneration can be achieved by thermal treatment at the low temperature (≤ 150°C) or even gas purging at room temperature (20°C), which avoided an explosion accident in the process of high-temperature regeneration.

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Section: Xrd and Raman Spectra Characterizationmentioning

confidence: 88%

Control of pore structure and surface chemistry of activated carbon derived from waste Zanthoxylum bungeanum branches for toluene removal in air

Lei

Xie

Chen

et al. 2020

Environ Sci Pollut Res

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“…In the AAB application, MNAC had a larger discharge capacity than UMAC due to the aforementioned special features. [185] Apple seeds were used in the synthesis of effective Ni-based bifunctional electrocatalysts containing N and C precursors. The carbon matrix was defect-rich and electrochemically activated due to the inclusion of heteroatoms, pyridinic, pyrrolic, and graphitic N moieties.…”

Section: Biomass-based Electrocatalystmentioning

confidence: 99%

“…The unmodified activated carbon (UMAC) was then converted into the modified nano‐activated carbon (MNAC) using a microwave‐assisted sonication process. In the AAB application, MNAC had a larger discharge capacity than UMAC due to the aforementioned special features [185] . Apple seeds were used in the synthesis of effective Ni‐based bifunctional electrocatalysts containing N and C precursors.…”

Section: Structural Design Of Electrocatalyst For Orr and Oer Activitymentioning

confidence: 99%

A Mechanistic Overview of the Current Status and Future Challenges in Air Cathode for Aluminum Air Batteries

Islam

Nayem

Anjum

et al. 2023

The Chemical Record

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Aluminum air batteries (AABs) are a desirable option for portable electronic devices and electric vehicles (EVs) due to their high theoretical energy density (8100 Wh K−1), low cost, and high safety compared to state‐of‐the‐art lithium‐ion batteries (LIBs). However, numerous unresolved technological and scientific issues are preventing AABs from expanding further. One of the key issues is the catalytic reaction kinetics of the air cathode as the fuel (oxygen) for AAB is reduced there. Additionally, the performance and price of an AAB are directly influenced by an air electrode integrated with an oxygen electrocatalyst, which is thought to be the most crucial element. In this study, we covered the oxygen chemistry of the air cathode as well as a brief discussion of the mechanistic insights of active catalysts and how they catalyze and enhance oxygen chemistry reactions. There is also extensive discussion of research into electrocatalytic materials that outperform Pt/C such as nonprecious metal catalysts, metal oxide, perovskites, metal‐organic framework, carbonaceous materials, and their composites. Finally, we provide an overview of the present state, and possible future direction for air cathodes in AABs.

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“…The oxygen diffusion into the metal–air battery occurs through a layer recognized as the gas diffusion layer. Furthermore, electrons are produced during the transition of metal into metallic ions which subsequently dissolve in the electrolyte. − All these steps that have occurred during the discharging process are reversed during the charging of these metal–air batteries. − Among the different metals employed in the development of metal–air batteries, aluminum (Al) has the maximum volumetric capacity of 8040 A h L –1 and is cost effective than many metal anodes such as Zn: 5850 A h L –1 , Li: 2060 A h L –1 , and Mg: 3830 A h L –1 . − An Al–air battery can deliver an excellent specific energy of 8100 W h kg Al –1 theoretically and thus is considered as a highly desirable metal upon comparison with other candidates for the development of metal–air batteries. The generation of electricity in the Al–air battery usually occurs through the reaction between Al and the oxygen in the ambient air and these batteries could be mechanically recharged using new Al anodes that could be obtained via recycling of hydrated aluminum oxide …”

Section: Introductionmentioning

confidence: 99%

Synergistic Reductive Electrolysis Mixture Additive-Based Dual-Cell Configuration: An Effective Approach for High-Performance Aqueous Aluminum–Air Battery

et al. 2023

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Neutral aqueous electrolyte-based aluminum−air (Al−air) batteries have managed to gather significant attention because of their characteristic safety and cost effectiveness. However, the formation of the passivation layer [Al(OH) 3 ] on the aluminum anode inhibits the long-term shelf life of the battery. Herein, a novel strategy to overturn the passivation by altering the aluminum/electrolyte interface is proposed. Incorporation of synergistic reductive electrolysis mixture additives (Tiron + NaNO 3 ) can significantly reduce the passivation of the aluminum anode. The efficacy of the Tiron + NaNO 3 synergistic mixture additive has been systematically examined using half-cell and full-cell with different concentrations of the additives in 0.5% NaCl. Furthermore, dual cell performance was investigated with optimum concentration (0.005 M Tiron + 0.005 M NaNO 3 ) of the additive in 0.5% NaCl as the anolyte and different concentrations of H 2 SO 4 as the catholyte. It is found that the resulting pumpless dual cell battery comprising neutral electrolyte with 0.005 M Tiron + 0.005 M NaNO 3 mixture additive as the anolyte and 1 M H 2 SO 4 as the catholyte demonstrated a remarkable cell potential of 1.14 V at a current density of 1 mA g −1 , which is closer to the theoretical value. Morphological investigations using optical microscopy studies and X-ray photoelectron spectroscopic investigations also confirmed that the Tiron + NaNO 3 additive is effective in preventing the discharge product on both anode and cathode surfaces and thus resulting in enhanced battery performance.

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Novel modified nano-activated carbon and its influence on the metal–O2 battery system

Cited by 12 publications

References 44 publications

Control of pore structure and surface chemistry of activated carbon derived from waste Zanthoxylum bungeanum branches for toluene removal in air

Control of pore structure and surface chemistry of activated carbon derived from waste Zanthoxylum bungeanum branches for toluene removal in air

A Mechanistic Overview of the Current Status and Future Challenges in Air Cathode for Aluminum Air Batteries

Synergistic Reductive Electrolysis Mixture Additive-Based Dual-Cell Configuration: An Effective Approach for High-Performance Aqueous Aluminum–Air Battery

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