Graphitic carbon nitride based materials for electrochemical energy storage

Luo, Yuqing; Yan, Yan; Zheng, Shasha; Xue, Huaiguo; Pang, Huan

doi:10.1039/c8ta08464e

Cited by 206 publications

(91 citation statements)

References 176 publications

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“…For conventional Li 2 S cathode it is highly unlikely that one can invoke induced electron transfer process. Therefore to sustain such reaction in Li system other elements are nowadays routinely exploited for example the addition of iron, phosphate and further the transition metal-organic frame work (Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019). Further with reference to NDRGO-Mo-Li-2S complex, we can see that the capacitor capacity has been greatly improved after adding Mo.…”

Section: Sub-sectionmentioning

confidence: 90%

“…Here it is worth highlighting the exceptional electrochemical stability of the heavily nitrogen doped carbon derived from a natural protein polymer (silk cocoon) and its transition metal sulfide composites; as stability of such composite always remained a challenge for different energy applications (Cravanzola et al, 2016;Dubey et al, 2018;Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019).…”

Section: Sub-sectionmentioning

confidence: 99%

“…Li 2 S suffers from poor electrical conductivity and sluggish electrochemical performance. Li 2 S-carbon composite electrodes are currently being investigated to improve stability and electrochemical activity (Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019). In one of our earlier works, to improve the conductivity and stability of Li 2 S, we developed a synthetic approach viz., we synthesized Li 2 S in a conductivity cage of heavily nitrogen doped reduced graphene oxide (NDRGO) derived from the wild Tassar silk cocoon (Jangir et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

et al. 2019

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Developing 'carbon lithium sulfide composite (C-Li 2 S)' cathode is a promising strategy for Li-S battery. Quite interestingly, when Li and S are caged in a heavily nitrogen-doped reduced graphene oxide (NDRGO) matrix derived from Tassar silk cocoon, the composite (NDRGO-Li-S) electrode behaves like a supercapacitor. In this work, we first optimized the concentrations of sulfur and then introduced molybdenum in the NDRGO matrix to develop a stable NDRGO-Mo-Li-2S (where 2 stands for 2M) composite electrode. The electrode design process utilized the concepts of "embedded redox couples" and "induced electron transfer"; a putative strategy to alter internal electron-shuttling kinetics for applications in various charge storage devices; where a time of electron-shuttling is the key. In NDRGO-Mo-Li-2S composite the charge transport occurs via "induced electron transfer," where Li + , is an external oxidant, provoking the inter atom electron transfer between Mo(VI), the internal oxidant, and S(-II), the internal reductant in Mo-S redox couple. This redox reaction is reversed using NDRGO, an external reductant inducing inter atom electron flow across [Mo(V)-(S2)] to complete the starting to product and back cycle. Such a redox cycle is competent for the flow of electrons in a lasting charge storage material through this unique bio-inorganic hybrid approach.

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Section: Sub-sectionmentioning

confidence: 90%

Section: Sub-sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

et al. 2019

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“…Usually, these materials have been synthesized by hydrothermal method, thermal pyrolysis, CVD, etc. Different carbon materials show different properties, such as g‐C 3 N 4 can modify the chemical and electronic properties of graphene because of its similar layered structure, bamboo‐like CNTs can shorten the Li + diffusion path . Fe 2 O 3 NPs were encapsulated in porous g‐C 3 N 4 /graphene sandwich‐type nanosheets by the hydrothermal method .…”

Section: Synthesis Of Ternary/multi‐graphene/fe2o3 Compositesmentioning

confidence: 99%

Synthesis and Applications of Graphene/Iron(III) Oxide Composites

Guo

Yang

et al. 2019

ChemElectroChem

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Iron(III) oxide (Fe 2 O 3 ) has attracted great attention, owing to its abundant natural resources, environmental friendliness, and low cost. Nevertheless, this material possesses an inferior rate capability and a cycle stability that is similar to most transition metal oxides. Graphene, with a one-atom-thick 2D structure, possesses superior mechanical properties, electrical conductivity, and stability, and excellent electrical and electrochemical behaviors. The hierarchical structure of graphene/Fe 2 O 3 composites provides a porous conductive network, close contact between the graphene and Fe 2 O 3 , a stress buffer space for charge transport, and superior structural stability. This composite consists of high conductivity graphene with interconnected Fe 2 O 3 , thus exposing abundant active sites for redox reactions and providing sufficient contacts with the electrolyte. Consequently, materials composed of Fe 2 O 3 and graphene have been widely explored, owing to their outstanding synergistic effects. Graphene can effectively limit the volume expansion and agglomeration of Fe 2 O 3 , whereas Fe 2 O 3 can prevent the restacking of graphene at the same time. This article mainly discusses the preparation of Fe 2 O 3 /graphene materials and their applications, including supercapacitors, rechargeable batteries, catalysis, and so forth. In addition, the perspectives and challenges of Fe 2 O 3 /graphene materials for different applications are also discussed.

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“…In this regard, hybridization of energy harvesters and/or storage devices have been introduced, which provides reliability and also improves energy harvesting performances to realize a sustainable power supply system. [17][18][19][20] In particular, quantum dots (QDs) have employed into a hybrid system containing a solar cell, piezoelectric and triboelectric as QDs possess fascinating material properties for solar energy harvesting. [21] The hybrid system has been successfully demonstrated by two different approaches; (1) an integration of various energy harvesters and (2) utilization of a piezotronic/ piezo-phototronic effect.…”

Section: Introductionmentioning

confidence: 99%

Quantum Dots for Hybrid Energy Harvesting: From Integration to Piezo‐Phototronics

Cho

Pak

et al. 2019

Israel Journal of Chemistry

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Energy harvesting, which converts wasted environmental energy into electricity by utilizing various physical effects, hasattracted tremendous research interests as is one of the key technologies to realize advanced electronics in the future. In this review, we introduce recent progress in the field of hybrid energy harvesting technology. In particular, we focus on a quantum dots (QD)‐based hybrid energy harvesting device. Attributed to fascinating material properties that QD possess, employment of QDs into hybrid energy harvesting has shown great potential for independent and sustainable energy supply.First, an integration of a QD solar cell into a mechanical energy harvester is discussed to harness different types of environmental energy sources simultaneously. Second, a comprehensive explanation of a piezotronic and piezo‐phototronic effect is provided, which is followed by QD‐based piezo‐phototronic applications. Finally, we summarize recent progress that has been made in energy harvesting technology involving a photovoltaic and piezo/triboelectric effect

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Graphitic carbon nitride based materials for electrochemical energy storage

Abstract: Graphitic carbon nitride (g-C3N4), with a unique structure analogous to graphite, has attracted ever-increasing attention for electrochemical energy storage due to its high surface area, metal-free characteristic, low cost and facile synthesis.

Cited by 206 publications

References 176 publications

“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

Synthesis and Applications of Graphene/Iron(III) Oxide Composites

Quantum Dots for Hybrid Energy Harvesting: From Integration to Piezo‐Phototronics

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