Nickel-Embedded Carbon Materials Derived from Wheat Flour for Li-Ion Storage

The biomass-based carbons anode materials have drawn significant attention because of admirable electrochemical performance on account of their nontoxicity and abundance resources. Herein, a novel type of nickel-embedded carbon material (nickel@carbon) is prepared by carbonizing the dough which is synthesized by mixing wheat flour and nickel nitrate as anode material in lithium-ion batteries. In the course of the carbonization process, the wheat flour is employed as a carbon precursor, while the nickel nitrate is introduced as both a graphitization catalyst and a pore-forming agent. The in situ formed Ni nanoparticles play a crucial role in catalyzing graphitization and regulating the carbon nanocrystalline structure. Mainly owing to the graphite-like carbon microcrystalline structure and the microporosity structure, the NC-600 sample exhibits a favorable reversible capacity (700.8 mAh g−1 at 0.1 A g−1 after 200 cycles), good rate performance (51.3 mAh g−1 at 20 A g−1), and long-cycling durability (257.25 mAh g−1 at 1 A g−1 after 800 cycles). Hence, this work proposes a promising inexpensive and highly sustainable biomass-based carbon anode material with superior electrochemical properties in LIBs.

Download Full-text

ZnO quantum dots anchored in multilayered and flexible amorphous carbon sheets for high performance and stable lithium ion batteries

Journal of Materials Chemistry A ◽

10.1039/c8ta12511b ◽

2019 ◽

Vol 7 (14) ◽

pp. 8460-8471 ◽

Cited By ~ 25

Author(s):

Joseph F. S. Fernando ◽

Chao Zhang ◽

Konstantin L. Firestein ◽

Jawahar Y. Nerkar ◽

Dmitri V. Golberg

Keyword(s):

Quantum Dots ◽

Lithium Ion Batteries ◽

Anode Material ◽

Amorphous Carbon ◽

High Performance ◽

Lithium Ion ◽

Carbon Anode ◽

Zno Quantum Dots

The role of the carbonaceous component in the excellent (de)lithiation properties of a ZnO/carbon anode material, as revealed by in situ TEM.

Download Full-text

Synthesis of Nitrogen and Phosphorus Dual-Doped Graphene Oxide as High-Performance Anode Material for Lithium-Ion Batteries

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.18872 ◽

2020 ◽

Vol 20 (12) ◽

pp. 7673-7679

Author(s):

Ke Wang ◽

Zhi Li

Keyword(s):

Graphene Oxide ◽

Lithium Ion Batteries ◽

Anode Material ◽

High Performance ◽

Lithium Ion ◽

Reversible Capacity ◽

Nitrogen And Phosphorus ◽

Xrd Pattern ◽

Ion Storage ◽

Doped Graphene

Nitrogen and phosphorus dual-doped graphene oxide was prepared by directly calcining a mixture of pure graphene oxide, urea (nitrogen source), and 1,2-bis(diphenylphosphino)methane (phosphorous source). The morphology and composition of the obtained dual-doped graphene oxide were confirmed by SEM, TEM, XRD pattern, Raman spectrum, and XPS. The nitrogen and phosphorous dual-doped graphene oxide was tested as an anode material of lithium-ion batteries (LIBs). The cycle and rate performance of the dual-doped graphene oxide were also examined. The dualdoped graphene oxide exhibited a superior initial discharge capacity of 2796 mAh·g−1 and excellent reversible capacity of 1200 mAh·g−1 at a current density of 100 mA·g−1 after 200 charge/discharge cycles, suggesting that the dual-doping of nitrogen and phosphorous is an effective way to enhance lithium-ion storage for graphene oxide.

Download Full-text

Easy preparation of SnO2@carbon composite nanofibers with improved lithium ion storage properties

Journal of Materials Research ◽

10.1557/jmr.2010.0194 ◽

2010 ◽

Vol 25 (8) ◽

pp. 1516-1524 ◽

Cited By ~ 46

Author(s):

Zunxian Yang ◽

Guodong Du ◽

Zaiping Guo ◽

Xuebin Yu ◽

Zhixin Chen ◽

...

Keyword(s):

Anode Material ◽

Carbon Nanofibers ◽

Lithium Ion ◽

Carbon Matrix ◽

Reversible Capacity ◽

Carbon Composite ◽

Constant Current ◽

Thermal Treatments ◽

Ion Storage ◽

Potential Use

SnO2@carbon nanofibers were synthesized by a combination of electrospinning and subsequent thermal treatments in air and then in argon to demonstrate their potential use as an anode material in lithium ion battery applications. The as-prepared SnO2@carbon nanofibers consist of SnO2 nanoparticles/nanocrystals encapsulated in a carbon matrix and contain many mesopores. Because of the charge pathways, both for the electrons and the lithium ions, and the buffering function provided by both the carbon encapsulating the SnO2 nanoparticles and the mesopores, which tends to alleviate the volumetric effects during the charge/discharge cycles, the nanofibers display a greatly improved reversible capacity of 420 mAh/g after 100 cycles at a constant current of 100 mA/g, and a sharply enhanced reversible capacity at higher rates (0.5, 1, and 2 C) compared with pure SnO2 nanofibers, which makes it a promising anode material for lithium ion batteries.

Download Full-text

Computational, Electrochemical and 7Li NMR Studies of Lithiated Disordered Carbons Electrodes in Lithium Ion Cells

MRS Proceedings ◽

10.1557/proc-496-95 ◽

1997 ◽

Vol 496 ◽

Cited By ~ 2

Author(s):

G. Sandί ◽

R. E. Gerald ◽

L. G. Scanlon ◽

K. A. Carrado ◽

R. E. Winans

Keyword(s):

Electrochemical Cell ◽

Lithium Ion ◽

Reversible Capacity ◽

Carbon Anode ◽

Nmr Studies ◽

Lithium Bonding ◽

7Li Nmr ◽

Disordered Carbon ◽

A Charge

ABSTRACTDisordered carbons that deliver high reversible capacity in electrochemical cells have been synthesized by using inorganic clays as templates to control the pore size and the surface area. The capacities obtained were much higher than those calculated if the resultant carbon had a graphitic-like structure. Computational chemistry was used to investigate the nature of lithium bonding in a carbon lattice unlike graphite. The lithium intercalated fullenere Lin-C60 was used as a model for our (non-graphitic) disordered carbon lattice. A dilithium-C60 system with a charge and multiplicity of (0,1) and a trilithium-C60 system with a charge and multiplicity of (0,4) were investigated. The spatial distribution of lithium ions in an electrochemical cell containing this novel disordered carbon material was investigated in situ by Li-7 NMR using an electrochemical cell that was incorporated into a toroid cavity nuclear magnetic resonance (NMR) imager. The concentration of solvated Li+ ions in the carbon anode appears to be larger than in the bulk electrolyte, is substantially lower near the copper/carbon interface, and does not change with cell charging.

Download Full-text

In situ electrochemical conversion of CO2 in molten salts to advanced energy materials with reduced carbon emissions

Science Advances ◽

10.1126/sciadv.aay9278 ◽

2020 ◽

Vol 6 (9) ◽

pp. eaay9278 ◽

Cited By ~ 13

Author(s):

Wei Weng ◽

Boming Jiang ◽

Zhen Wang ◽

Wei Xiao

Keyword(s):

Carbon Emissions ◽

Rate Capability ◽

Lithium Ion ◽

Reversible Capacity ◽

High Rate ◽

Carbon Anode ◽

Energy Materials ◽

Long Cycle Life ◽

In Operando

Fixation of CO2 on the occasion of its generation to produce advanced energy materials has been an ideal solution to relieve global warming. We herein report a delicately designed molten salt electrolyzer using molten NaCl-CaCl2-CaO as electrolyte, soluble GeO2 as Ge feedstock, conducting substrates as cathode, and carbon as anode. A cathode-anode synergy is verified for coelectrolysis of soluble GeO2 and in situ–generated CO2 at the carbon anode to cathodic Ge nanoparticles encapsulated in carbon nanotubes (Ge@CNTs), contributing to enhanced oxygen evolution at carbon anode and hence reduced CO2 emissions. When evaluated as anode materials for lithium-ion batteries, the Ge@CNTs hybrid shows high reversible capacity, long cycle life, and excellent high-rate capability. The process contributes to metallurgy with reduced carbon emissions, in operando CO2 fixation to advanced energy materials, and upgraded conversion of carbon bulks to CNTs.

Download Full-text