CNF-grafted carbon fibers as a binder-free cathode for Lithium Oxygen batteries with a superior performance

Zhu, Xingbao; Wu, Yuanguo; Wan, Wei; Yan, Yingzhang; Wang, Yu; He, Xianglei; Lü, Zhe

doi:10.1016/j.ijhydene.2017.11.130

Cited by 15 publications

(9 citation statements)

References 54 publications

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“…The contents of C, N, and O in C–N fibers were 84.43, 6.28, and 9.29%, respectively, by calculating the diffraction peak areas via Gauss–Seidel iteration of the peaks in XPS spectra. Compared with previous works, the content of doped N was relatively higher, which might be attributed to the pre-nitride process before carbonization. − And a large amount of available N-containing carbon material in the air cathode is beneficial for improving the catalytic performance, so this may play a positive role in improving the interfacial environment and cycling performance of Li-air batteries . Furthermore, the energy-dispersive spectrometer (EDS) elemental profiles of C–N fibers are shown in Figure S2.…”

Section: Resultsmentioning

confidence: 99%

Waste Cigarette Butts-Derived Nitrogen-Doped Carbon Fibers Loaded with Ru Nanoparticles as an Efficient Cathode Catalyst for Lithium-Oxygen Batteries

Wang

Yin

Fang

et al. 2023

ACS Sustainable Chem. Eng.

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Low catalytic activity and high cost of cathode catalysts hinder the large-scale commercial application of lithium-oxygen (Li-O 2 ) batteries. In this work, waste cigarette butts, which inherently have a porous fiber structure, were selected as the precursor of the carbon material for the cathode catalyst of Li-O 2 batteries. The porous nitrogen-doped carbon material was prepared by simple heat treatment of waste cigarette butts. The rich porous structure of the obtained carbon fiber material effectively enhances the diffusion of oxygen molecules and provides ample space for the discharge products. N doping in carbon fibers enhances the bifunctional catalytic activity toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which was corroborated by density functional theory (DFT) calculation. The assembled Li-O 2 battery with C−N fibers-loaded Ru nanoparticles catalyst delivers an initial discharge capacity of up to 12 036.3 mA h g −1 and can be cycled stably for more than 800 cycles (4000 h) at a current density of 200 mA g −1 and a cutoff capacity of 500 mA h g −1 . Even at a high current density of 500 mA g −1 , the cells still show a high average discharge voltage of 2.28 V with excellent cycle stability and rate capability. XPS analysis proves that the cathode material can effectively inhibit the formation of Li 2 CO 3 and Li 2 O byproducts. This work provides a cost-effective solution to solve the cathode catalyst problem of Li-O 2 batteries and improve their cycling stability as well as environment protection.

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Section: Resultsmentioning

confidence: 99%

Waste Cigarette Butts-Derived Nitrogen-Doped Carbon Fibers Loaded with Ru Nanoparticles as an Efficient Cathode Catalyst for Lithium-Oxygen Batteries

Wang

Yin

Fang

et al. 2023

ACS Sustainable Chem. Eng.

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“…At a discharge current density of 300 mA g −1 , the specific capacity of the battery is 9965 mAh g −1 , and the battery can carry out 120 cycles. Zhu et al [82] . introduced the carbon nanofibers (CNF) grafting onto the electrode of carbon paper to enable it to have the bimodal pore structure, which achieved the effective oxygen transport and diffusion by macropore structure (diameter of 10 μm) and realized containing the products Li 2 O 2 by the smaller pore (diameter of 100 nm) (as shown in figure 17).…”

Section: Effect Of Porous Electrode On Oxygen Diffusion and Battery Performancementioning

confidence: 99%

Review and Recent Advances of Oxygen Transfer in Li‐air Batteries

Hou

et al. 2021

ChemElectroChem

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The development of high performance and low weight energy storage devices has been recently geared towards new energy batteries for electric and hybrid electric vehicles. Li‐air batteries are considered as an emerging energy source for electric cars because of their attractive theoretical specific energy of 11,400 Wh kg−1. Oxygen, as the positive electrode reaction substance of Li‐air battery, predominantly affects the dynamic performance of the battery and its diffusion is an important factor limiting the discharge process. Based on the resistance of oxygen transmission, the characteristics and influence of the Li‐air batteries are reviewed in this paper. The research on oxygen selective membrane, oxygen dissolution and transfer in positive electrode and electrolyte, structure of positive electrode and oxygenated additive in electrolyte are discussed to narrow down the internal mechanism factors that influence the Li‐air battery performance and service life. By discussing pathways to reduce the oxygen transmission resistance and hence improve the performance and life of the battery, we provide future perspectives on the application of Li‐air battery in electric vehicular power systems.

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“…To enhance the properties of these carbon materials, their morphology can be changed into CNTs and carbon nanofibers (CNFs). The one-dimensional (1D) architecture of CNTs and CNFs enhances the efficiency of charge transfer and the dimensional stability of the electrode during the charge–discharge process and its cycle life [ 46 , 47 ]. Despite their advantages, CNTs and CNFs have issues with the agglomeration of particles during the electrochemical process, which weakens the performance of LOBs.…”

Section: Basic Principles Of Li–o 2 Batteriesmentioning

confidence: 99%

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

Karuppasamy

Prasanna²,

Jothi

et al. 2020

Nanomaterials

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A large volume of research on lithium–oxygen (Li–O2) batteries (LOBs) has been conducted in the recent decades, inspired by their high energy density and power density. However, these future generation energy-storage devices are still subject to technical limitations, including a squat round-trip efficiency and a deprived rate-capability, due to the slow-moving electrochemical kinetics of both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) over the surface of the cathode catalyst. Because the electrochemistry of LOBs is rather complex, only a limited range of cathode catalysts has been employed in the past. To understand the catalytic mechanisms involved and improve overall cell performance, the development of new cathode electrocatalysts with enhanced round-trip efficiency is extremely important. In this context, transition metal carbides and nitrides (TMCs and TMNs, respectively) have been explored as potential catalysts to overcome the slow kinetics of electrochemical reactions. To provide an accessible and up-to-date summary for the research community, the present paper reviews the recent advancements of TMCs and TMNs and its applications as active electrocatalysts for LOBs. In particular, significant studies on the rational design of catalysts and the properties of TMC/TMN in LOBs are discussed, and the prospects and challenges facing the continued development of TMC/TMN electrocatalysts and strategies for attaining higher OER/ORR activity in LOBs are presented.

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CNF-grafted carbon fibers as a binder-free cathode for Lithium Oxygen batteries with a superior performance

Cited by 15 publications

References 54 publications

Waste Cigarette Butts-Derived Nitrogen-Doped Carbon Fibers Loaded with Ru Nanoparticles as an Efficient Cathode Catalyst for Lithium-Oxygen Batteries

Waste Cigarette Butts-Derived Nitrogen-Doped Carbon Fibers Loaded with Ru Nanoparticles as an Efficient Cathode Catalyst for Lithium-Oxygen Batteries

Review and Recent Advances of Oxygen Transfer in Li‐air Batteries

Recent Advances in Nanostructured Transition Metal Carbide- and Nitride-Based Cathode Electrocatalysts for Li–O2 Batteries (LOBs): A Brief Review

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