Silicon/Biogas-Derived Carbon Nanofibers Composites for Anodes of Lithium-Ion Batteries

The electrochemical performance of novel nano-silicon/biogas-derived carbon nanofibers composites (nSi/BCNFs) as anodes in lithium-ion batteries was investigated, focusing on composition and galvanostatic cycling conditions. The optimization of these variables contributes to reduce the stress associated with silicon lithiation/delithiation by accommodating/controlling the volume changes, thus preventing anode degradation and therefore improving its performance regarding capacity and stability. Specific capacities up to 520 mAh g−1 with coulombic efficiency > 95% and 94% of capacity retention are achieved for nSi/BCNFs anodes at electric current density of 100/200 mA g−1 and low cutoff voltage of 80 mV. Among the BCNFs, those no-graphitized with fishbone microstructure, which have a great number of active sites to interact with nSi particles, are the best carbon matrices. Specifically, a nSi:BCNFs 1:1 weight ratio in the composite is the optimal, since it allows a compromise between a suitable specific capacity, which is higher than that of graphitic materials currently commercialized for LIBs, and an acceptable capacity retention along cycling. Low cutoff voltage in the 80–100 mV range is the most suitable for the cycling of nSi/BCNFs anodes because it avoids formation of the highest lithiated phase (Li15Si4) and therefore the complete silicon lithiation, which leads to electrode damage.

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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.

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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.

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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.

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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.

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Mesoporous silica nanoparticles as high performance anode materials for lithium-ion batteries

New Journal of Chemistry ◽

10.1039/c6nj01698g ◽

2016 ◽

Vol 40 (10) ◽

pp. 8202-8205 ◽

Cited By ~ 12

Author(s):

Yourong Wang ◽

Kai Xie ◽

Xu Guo ◽

Wei Zhou ◽

Guangsen Song ◽

...

Keyword(s):

Mesoporous Silica ◽

Lithium Ion Batteries ◽

Anode Materials ◽

High Performance ◽

Mesoporous Silica Nanoparticles ◽

Coulombic Efficiency ◽

Specific Capacity ◽

Lithium Ion ◽

High Specific Capacity ◽

Good Cycling Stability

A mesoporous nano-SiO2 anode delivers high specific capacity, good cycling stability and high Coulombic efficiency.

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Core–shell Si/Cu nanocomposites synthesized by self-limiting surface reaction as anodes for lithium ion batteries

Functional Materials Letters ◽

10.1142/s1793604717500254 ◽

2017 ◽

Vol 10 (03) ◽

pp. 1750025 ◽

Cited By ~ 7

Author(s):

Kaiqi Xu ◽

Zhizhen Zhang ◽

Wei Su ◽

Xuejie Huang

Keyword(s):

Lithium Ion Batteries ◽

Surface Reaction ◽

Coulombic Efficiency ◽

Electronic Conductivity ◽

Lithium Ion ◽

Core Shell ◽

Cu Nanoparticles ◽

Capacity Retention ◽

First Time ◽

Limiting Surface

Core–shell Si/Cu nanocomposites were synthesized via a flexible self-limiting surface reaction without extra reductant for the first time. The nano Si was uniformly coated with Cu nanoparticles with a diameter of 5–10[Formula: see text]nm, which can enhance the electronic conductivity of the nanocomposites and buffer the huge volume change during charge/discharge owing to its high ductility. Benefited from the unique structure, the Si/Cu nanocomposites exhibited a good electrochemical performance as anodes for lithium ion batteries, which exhibited a capacity retention of 656[Formula: see text]mAh/g after 50 cycles and a coulombic efficiency of more than 99%.

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A novel approach to prepare Si/C nanocomposites with yolk–shell structures for lithium ion batteries

RSC Advances ◽

10.1039/c4ra07043g ◽

2014 ◽

Vol 4 (68) ◽

pp. 36218-36225 ◽

Cited By ~ 29

Author(s):

Huan-Huan Li ◽

Jia-Wei Wang ◽

Xing-Long Wu ◽

Hai-Zhu Sun ◽

Feng-Mei Yang ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Shell Structure ◽

Coulombic Efficiency ◽

Specific Capacity ◽

Lithium Ion ◽

Shell Structures ◽

Structured Materials ◽

Novel Approach ◽

Novel Method ◽

Good Retention

A novel method was developed to prepare mesoporous Si/C nanocomposites with yolk–shell structure (MSi@C), which showed good retention of specific capacity (1264.7 mA h g−1 after 150 cycles with coulombic efficiency above 99%). This work provides an alternative method to fabricate yolk–shell structured materials.

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Enhanced Electrochemical Performance Promoted by Tin in Silica Anode Materials for Stable and High-Capacity Lithium-Ion Batteries

Materials ◽

10.3390/ma14051071 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1071

Author(s):

Xuli Ding ◽

Daowei Liang ◽

Hongda Zhao

Keyword(s):

Lithium Ion Batteries ◽

Anode Material ◽

Silicon Oxide ◽

Coulombic Efficiency ◽

Specific Capacity ◽

High Capacity ◽

Rate Capability ◽

Lithium Ion ◽

Phase Evolution ◽

Discharge Process

Although the silicon oxide (SiO2) as an anode material shows potential and promise for lithium-ion batteries (LIBs), owing to its high capacity, low cost, abundance, and safety, severe capacity decay and sluggish charge transfer during the discharge–charge process has caused a serious challenge for available applications. Herein, a novel 3D porous silicon oxide@Pourous Carbon@Tin (SiO2@Pc@Sn) composite anode material was firstly designed and synthesized by freeze-drying and thermal-melting self-assembly, in which SiO2 microparticles were encapsulated in the porous carbon as well as Sn nanoballs being uniformly dispersed in the SiO2@Pc-like sesame seeds, effectively constructing a robust and conductive 3D porous Jujube cake-like architecture that is beneficial for fast ion transfer and high structural stability. Such a SiO2@Pc@Sn micro-nano hierarchical structure as a LIBs anode exhibits a large reversible specific capacity ~520 mAh·g−1, initial coulombic efficiency (ICE) ~52%, outstanding rate capability, and excellent cycling stability over 100 cycles. Furthermore, the phase evolution and underlying electrochemical mechanism during the charge–discharge process were further uncovered by cyclic voltammetry (CV) investigation.

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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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Free-standing nitrogen doped V-O-C nanofiber film as promising electrode for flexible lithium-ion batteries

RSC Advances ◽

10.1039/c4ra07447e ◽

2014 ◽

Vol 4 (92) ◽

pp. 51062-51066 ◽

Cited By ~ 1

Author(s):

Xia Chen ◽

Yujing Sha ◽

Rui Cai ◽

Moses O. Tade ◽

Zongping Shao

Keyword(s):

Lithium Ion Batteries ◽

Coulombic Efficiency ◽

Lithium Ion ◽

Carbon Films ◽

Free Standing ◽

Capacity Retention ◽

Nitrogen Doped ◽

Discharge Capacitance ◽

Nanofiber Film ◽

Co Doped

Highly flexible vanadium and nitrogen co-doped carbon films were synthesized by electrospinning, delivering an outstanding discharge capacitance of 1380 mA h g−1 at 0.1 A g−1. The Coulombic efficiency was as high as 63.3% and a capacity retention ratio of 80% was obtained after cycling at 6.4 A g−1 for 500 times.

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