Introducing nanodiamond into TiO2-based anode for improving the performance of lithium-ion batteries

In this work, we report a new type of anode consisting of mixed detonation nanodiamonds (DNDs) and titanium dioxide (TiO2) hollow nanospheres (HNSs) for improving the specific capacity and cycle stability of lithium ion batteries (LIBs).

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Ti3C2Tx-Based Electrodes with Enhanced Pseudocapacitance for High-Performance Lithium-ion Batteries

NANO ◽

10.1142/s1793292020500514 ◽

2020 ◽

Vol 15 (04) ◽

pp. 2050051

Author(s):

Rudong Zheng ◽

Lili Wu ◽

Jiabao Zhao ◽

Chuncheng Zhu ◽

Hong Gao

Keyword(s):

Lithium Ion Batteries ◽

High Performance ◽

Specific Capacity ◽

Lithium Ion ◽

Kinetic Mechanism ◽

Ion Diffusion ◽

Two Samples ◽

New Type ◽

Current Densities ◽

Lithium Ion Diffusion

Ti3C2Tx, a new type of two-dimensional material, is a prospective anode material in lithium-ion batteries (LIBs) for its low lithium-ion diffusion barrier, high conductivity and many other excellent properties. In this paper, multilayer Ti3C2Tx and delaminated Ti3C2Tx samples are prepared by etching Ti3AlC2 powder with HF and [Formula: see text], respectively. We explore the application of the two samples in LIBs, and analyze their electrochemical behavior and kinetic mechanism. At the current densities of 0.1[Formula: see text]A[Formula: see text]g[Formula: see text], the delaminated Ti3C2Tx electrode delivered higher capacities of 255[Formula: see text]mAh[Formula: see text]g[Formula: see text] than multilayer Ti3C2Tx electrode (100[Formula: see text]mAh[Formula: see text]g[Formula: see text]). Even after 1000 cycles, the specific capacity of the delaminated Ti3C2Tx is still up to 205[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]. This work proves the great potential of the delaminated Ti3C2Tx for lithium-ion storage.

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Effect of Fluorine-Containing Additive on the Electrochemical Properties of Silicon Anode for Lithium-Ion Batteries

Materials Science Forum ◽

10.4028/www.scientific.net/msf.944.699 ◽

2019 ◽

Vol 944 ◽

pp. 699-704 ◽

Cited By ~ 1

Author(s):

Jing Wang ◽

Xiao Hang Yang ◽

Yue Feng Su ◽

Shi Chen ◽

Feng Wu

Keyword(s):

Lithium Ion Batteries ◽

Coulombic Efficiency ◽

Solid Electrolyte Interphase ◽

Specific Capacity ◽

Lithium Ion ◽

Silicon Anode ◽

Cycle Stability ◽

Promising Candidate ◽

Sem Images ◽

The Stability

Silicon anode is a promising candidate as an alternative to the conventional graphitic anode in lithium-ion batteries. In this work, silicon anode is modified by NH4F using a facile method in air. The concentration of NH4F on the electrochemical performance is systematically checked. The 5wt%NH4F-modified silicon anode exhibits enhanced cycle and rate performances, the first discharge specific capacity is 3958 mAh·g-1 with 86.45% as the coulombic efficiency at 0.4A·g-1. The capacity can maintain at 703.3 mAh·g-1 after 50 cycles, exhibiting a much better cycle stability than pristine silicon anode (329.9 mAh·g-1 after 50 cycles). SEM images confirm that NH4F can alleviate the volume expansion of silicon since LiF can be generated at the surface which is beneficial to the stability of solid-electrolyte interphase (SEI).

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Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries

Journal of Materials Chemistry A ◽

10.1039/c6ta09161j ◽

2017 ◽

Vol 5 (4) ◽

pp. 1588-1594 ◽

Cited By ~ 13

Author(s):

Yanshan Huang ◽

Dongqing Wu ◽

Arezoo Dianat ◽

Manferd Bobeth ◽

Tao Huang ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Cathode Materials ◽

High Performance ◽

Specific Capacity ◽

Lithium Ion ◽

Cycle Stability ◽

Nitrogen Doped ◽

Nitrogen Doped Graphene ◽

Doped Graphene ◽

Pyridinic N

As cathode materials in lithium ion batteries, nitrogen-doped graphene frameworks (N-GFs) manifest excellent specific capacity and cycle stability, owing to the fast surface faradaic reactions of pyridinic N and pyridinic N-oxide with both p- and n-doped states.

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Hollow nanospheres composed of titanium dioxide nanocrystals modified with carbon and gold for high performance lithium ion batteries

Journal of Power Sources ◽

10.1016/j.jpowsour.2015.06.093 ◽

2015 ◽

Vol 294 ◽

pp. 465-472 ◽

Cited By ~ 17

Author(s):

Hongbo Geng ◽

Xueqin Cao ◽

Yu Zhang ◽

Kaiming Geng ◽

Genlong Qu ◽

...

Keyword(s):

Titanium Dioxide ◽

Lithium Ion Batteries ◽

High Performance ◽

Lithium Ion ◽

Hollow Nanospheres

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Porous LiNi0.5Mn1.5O4 sphere as 5 V cathode material for lithium ion batteries

Journal of Materials Chemistry A ◽

10.1039/c4ta02903h ◽

2014 ◽

Vol 2 (39) ◽

pp. 16434-16442 ◽

Cited By ~ 37

Author(s):

Jing Wang ◽

Weiqing Lin ◽

Bihe Wu ◽

Jinbao Zhao

Keyword(s):

Cathode Material ◽

Lithium Ion Batteries ◽

Spinel Structure ◽

Rate Capability ◽

Lithium Ion ◽

Impregnation Method ◽

Cycle Stability ◽

Air Cathode ◽

Secondary Battery ◽

New Type

A new type of microsized porous spherical LiNi0.5Mn1.5O4 (LNMO-Air) cathode material for a lithium ion secondary battery has been synthesized by an impregnation method using highly reactive nanocupule MnO2 spheres as the manganese source. These LNMO-Air spheres are aggregates of nanosized polyhedron particles with well-defined cubic spinel structure. They showed excellent rate capability and cycle stability, compared with other microspheres of LNMO.

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Advances in the Applications of Graphene-Based Nanocomposites in Clean Energy Materials

Crystals ◽

10.3390/cryst11010047 ◽

2021 ◽

Vol 11 (1) ◽

pp. 47

Author(s):

Yiqiu Xiang ◽

Ling Xin ◽

Jiwei Hu ◽

Caifang Li ◽

Jimei Qi ◽

...

Keyword(s):

Solar Cells ◽

Fuel Cells ◽

Lithium Ion Batteries ◽

Electrode Materials ◽

Specific Capacity ◽

Lithium Ion ◽

Clean Energy ◽

Proton Exchange ◽

Energy Storage And Conversion ◽

Thermoelectric Conversion

Extensive use of fossil fuels can lead to energy depletion and serious environmental pollution. Therefore, it is necessary to solve these problems by developing clean energy. Graphene materials own the advantages of high electrocatalytic activity, high conductivity, excellent mechanical strength, strong flexibility, large specific surface area and light weight, thus giving the potential to store electric charge, ions or hydrogen. Graphene-based nanocomposites have become new research hotspots in the field of energy storage and conversion, such as in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion. Graphene as a catalyst carrier of hydrogen fuel cells has been further modified to obtain higher and more uniform metal dispersion, hence improving the electrocatalyst activity. Moreover, it can complement the network of electroactive materials to buffer the change of electrode volume and prevent the breakage and aggregation of electrode materials, and graphene oxide is also used as a cheap and sustainable proton exchange membrane. In lithium-ion batteries, substituting heteroatoms for carbon atoms in graphene composite electrodes can produce defects on the graphitized surface which have a good reversible specific capacity and increased energy and power densities. In solar cells, the performance of the interface and junction is enhanced by using a few layers of graphene-based composites and more electron-hole pairs are collected; therefore, the conversion efficiency is increased. Graphene has a high Seebeck coefficient, and therefore, it is a potential thermoelectric material. In this paper, we review the latest progress in the synthesis, characterization, evaluation and properties of graphene-based composites and their practical applications in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion.

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Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

Nanotechnology Reviews ◽

10.1515/ntrev-2021-0020 ◽

2021 ◽

Vol 10 (1) ◽

pp. 210-220

Author(s):

Fangfang Wang ◽

Ruoyu Hong ◽

Xuesong Lu ◽

Huiyong Liu ◽

Yuan Zhu ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Solid Phase ◽

Low Cost ◽

Specific Capacity ◽

High Capacity ◽

Lithium Ion ◽

Side Reaction ◽

Chemical Route ◽

High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

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