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

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).

Download Full-text

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

New Journal of Chemistry ◽

10.1039/c8nj06226a ◽

2019 ◽

Vol 43 (9) ◽

pp. 3907-3912

Author(s):

Xuan Gao ◽

Xiaochen Sun ◽

Zhigang Jiang ◽

Qiliang Wang ◽

Nan Gao ◽

...

Keyword(s):

Titanium Dioxide ◽

Lithium Ion Batteries ◽

Specific Capacity ◽

Lithium Ion ◽

Detonation Nanodiamonds ◽

Cycle Stability ◽

Hollow Nanospheres ◽

New Type

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).

Download Full-text

Decomposition of the fluoroethylene carbonate additive and the glue effect of lithium fluoride products for the solid electrolyte interphase: an ab initio study

Physical Chemistry Chemical Physics ◽

10.1039/c5cp07583a ◽

2016 ◽

Vol 18 (12) ◽

pp. 8643-8653 ◽

Cited By ~ 63

Author(s):

Yukihiro Okuno ◽

Keisuke Ushirogata ◽

Keitaro Sodeyama ◽

Yoshitaka Tateyama

Keyword(s):

Solid Electrolyte ◽

Lithium Ion Batteries ◽

Electrolyte Solution ◽

Lithium Fluoride ◽

Solid Electrolyte Interphase ◽

Lithium Ion ◽

Ab Initio Study ◽

Fluoroethylene Carbonate ◽

The Stability ◽

Fluoroethylene Carbonate Additive

Additives in the electrolyte solution of lithium-ion batteries (LIBs) have a large impact on the performance of the solid electrolyte interphase (SEI) that forms on the anode and is a key to the stability and durability of LIBs.

Download Full-text

Nickel Foam-Supported NiO/Ag Porous Spheres Prepared by Electrodeposition as Anode for Lithium-Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.621 ◽

2008 ◽

Vol 47-50 ◽

pp. 621-624 ◽

Cited By ~ 1

Author(s):

X.H. Huang ◽

J.P. Tu ◽

X.H. Xia ◽

X.L. Wang

Keyword(s):

Lithium Ion Batteries ◽

Electrical Conduction ◽

Ag Nanoparticles ◽

Coulombic Efficiency ◽

Nickel Foam ◽

Lithium Ion ◽

Cycling Performance ◽

Electrodeposition Technique ◽

Sem Images ◽

Porous Spheres

Nickel foam-supported NiO spheres were prepared by an electrodeposition technique using nickel foam as the substrate, and then the Ag nanoparticles were loaded on the NiO spheres. SEM images showed that these NiO/Ag spheres are porous with a size of about 2 µm. As an anode for lithium-ion batteries, the nickel foam-supported NiO/Ag spheres exhibit higher coulombic efficiency, weaker polarization, and better cycling performance as compared to the NiO spheres. The improvements of these electrochemical properties are attributed to the Ag nanoparticles, which enhanced the electrical conduction of the electrode.

Download Full-text

SnSe/Cu2SnSe3 Heterojunction Structure with High Initial Coulombic Efficiency for Lithium-Ion Battery Anodes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.905.135 ◽

2022 ◽

Vol 905 ◽

pp. 135-141

Author(s):

Bao Juan Yang ◽

Rui Xia ◽

Su Bin Jiang ◽

Mei Zhen Gao

Keyword(s):

Lithium Ion Batteries ◽

Coulombic Efficiency ◽

Specific Capacity ◽

Three Dimensional ◽

Lithium Ion ◽

Diffusion Path ◽

Thermal Method ◽

Tin Selenide ◽

Ion Doping ◽

Initial Coulombic Efficiency

Due to high theoretical specific capacity and abundant reserves, tin selenide-based materials have received tremendous attentions in the fields of lithium-ion batteries. Nevertheless, the huge volume changes during insertion/de-intercalation processes deteriorate the Coulombic Efficiency greatly. In order to solve it, the researchers have made great efforts by means of controlling nanoparticles granularity, carbon coating, ion doping et al. In this study, SnSe/Cu2SnSe3 heterojunction nanocomposites were synthesized by solvo-thermal method. The resulting SnSe/Cu2SnSe3 is a three-dimensional flower-like hierarchical nanostructure composed of nanoscale thin lamellae of a thickness of 8-12 nm. The unique nanostructure could shorten the diffusion path of lithium ions and expedite charge transfer, and therefore enhance the reaction kinetics. Compared with SnSe, the initial Coulombic efficiency of SnSe/Cu2SnSe3 is raised from 59% to 90% as the anode material of lithium-ion batteries.

Download Full-text

Enhancing the performance of Li3VO4 by combining nanotechnology and surface carbon coating for lithium ion batteries

Journal of Materials Chemistry A ◽

10.1039/c5ta02094h ◽

2015 ◽

Vol 3 (21) ◽

pp. 11253-11260 ◽

Cited By ~ 39

Author(s):

Gaoqi Shao ◽

Lin Gan ◽

Ying Ma ◽

Huiqiao Li ◽

Tianyou Zhai

Keyword(s):

Lithium Ion Batteries ◽

Ball Milling ◽

Carbon Coating ◽

Coulombic Efficiency ◽

Specific Capacity ◽

Lithium Ion ◽

Surface Carbon ◽

Conductive Additive ◽

Carbon Coated ◽

Coating Layers

Carbon-coated nanosized Li3VO4 was successfully obtained by combination of ball milling and CVD techniques. The thin and full coating layers of carbon can greatly decrease the amount of conductive additive in the electrode and enhance the first coulombic efficiency, specific capacity and rate performances of Li3VO4.

Download Full-text

Lithium-conducting covalent-organic-frameworks as artificial solid-electrolyte-interphase on silicon anode for high performance lithium ion batteries

Nano Energy ◽

10.1016/j.nanoen.2020.104657 ◽

2020 ◽

Vol 72 ◽

pp. 104657 ◽

Cited By ~ 5

Author(s):

Qing Ai ◽

Qiyi Fang ◽

Jia Liang ◽

Xinyu Xu ◽

Tianshu Zhai ◽

...

Keyword(s):

Solid Electrolyte ◽

Lithium Ion Batteries ◽

High Performance ◽

Solid Electrolyte Interphase ◽

Lithium Ion ◽

Silicon Anode ◽

Covalent Organic Frameworks

Download Full-text

Silicon-Nanographite Aerogel-Based Anodes for High Performance Lithium Ion Batteries

Scientific Reports ◽

10.1038/s41598-019-51087-y ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 2

Author(s):

Manisha Phadatare ◽

Rohan Patil ◽

Nicklas Blomquist ◽

Sven Forsberg ◽

Jonas Örtegren ◽

...

Keyword(s):

Lithium Ion Batteries ◽

High Performance ◽

Large Scale ◽

Coulombic Efficiency ◽

Specific Capacity ◽

High Capacity ◽

Lithium Ion ◽

Life Cycles ◽

Scale Production ◽

Silicon Anodes

Abstract To increase the energy storage density of lithium-ion batteries, silicon anodes have been explored due to their high capacity. One of the main challenges for silicon anodes are large volume variations during the lithiation processes. Recently, several high-performance schemes have been demonstrated with increased life cycles utilizing nanomaterials such as nanoparticles, nanowires, and thin films. However, a method that allows the large-scale production of silicon anodes remains to be demonstrated. Herein, we address this question by suggesting new scalable nanomaterial-based anodes. Si nanoparticles were grown on nanographite flakes by aerogel fabrication route from Si powder and nanographite mixture using polyvinyl alcohol (PVA). This silicon-nanographite aerogel electrode has stable specific capacity even at high current rates and exhibit good cyclic stability. The specific capacity is 455 mAh g−1 for 200th cycles with a coulombic efficiency of 97% at a current density 100 mA g−1.

Download Full-text

Cobalt Sulfide Confined in N-Doped Porous Branched Carbon Nanotubes for Lithium-Ion Batteries

Nano-Micro Letters ◽

10.1007/s40820-019-0259-z ◽

2019 ◽

Vol 11 (1) ◽

Cited By ~ 8

Author(s):

Yongsheng Zhou ◽

Yingchun Zhu ◽

Bingshe Xu ◽

Xueji Zhang ◽

Khalid A. Al-Ghanim ◽

...

Keyword(s):

Carbon Nanotubes ◽

Lithium Ion Batteries ◽

Current Density ◽

Large Scale ◽

Coulombic Efficiency ◽

Specific Capacity ◽

Lithium Ion ◽

Cobalt Sulfide ◽

Energy Storage Devices ◽

A Current

Abstract Lithium-ion batteries (LIBs) are considered new generation of large-scale energy-storage devices. However, LIBs suffer from a lack of desirable anode materials with excellent specific capacity and cycling stability. In this work, we design a novel hierarchical structure constructed by encapsulating cobalt sulfide nanowires within nitrogen-doped porous branched carbon nanotubes (NBNTs) for LIBs. The unique hierarchical Co9S8@NBNT electrode displayed a reversible specific capacity of 1310 mAh g−1 at a current density of 0.1 A g−1, and was able to maintain a stable reversible discharge capacity of 1109 mAh g−1 at a current density of 0.5 A g−1 with coulombic efficiency reaching almost 100% for 200 cycles. The excellent rate and cycling capabilities can be ascribed to the hierarchical porosity of the one-dimensional Co9S8@NBNT internetworks, the incorporation of nitrogen doping, and the carbon nanotube confinement of the active cobalt sulfide nanowires offering a proximate electron pathway for the isolated nanoparticles and shielding of the cobalt sulfide nanowires from pulverization over long cycling periods.

Download Full-text