Characterization of LTO/Silicon Oxycarbide with Activated Carbon Addition for Anode of Lithium-Ion Batteries

2020 ◽  
Vol 1000 ◽  
pp. 3-11
Author(s):  
Bambang Priyono ◽  
Mochamad Febby Fitratama ◽  
Shania Roulli ◽  
Achmad Subhan ◽  
Anne Zulfia Syahrial
Keyword(s):  
Activated Carbon ◽  
Silicone Oil ◽  
Spinel Phase ◽  
Sol Gel ◽  
Specific Capacity ◽  
Performance Testing ◽  
Lithium Ion ◽  
Lithium Titanate ◽  
High Conductivity ◽  
Silicon Oxycarbide

Lithium Titanate (LTO) is one of the anode materials that has good performance because of its unique properties, which is zero-strain. In this study, LTO was synthesized using the sol-gel method and mechanochemical hydrothermal with LiOH as the source of lithium-ion. Silicone oxycarbide (SiOC) is a ceramic material synthesized through a simple pyrolysis process of silicone oil precursors. Carbon used in this study is a carbon activated process so that activated carbon is obtained with a large pore size. The addition of activated carbon to the LTO is done during the sol-gel process, while the addition of SiOC to LTO-C is performed during the slurry making process. SEM-EDS shows the extent of the elements in the sample where Ti, F, Si, O, and C are present. Also, SEM-EDS characterization shows an increase in the amount of carbon in each sample. XRD shows the presence of the LTO spinel phase and impurity phases such as TiO2 rutile and anatase, and Li2TiO3. In EIS performance testing, low resistivity expresses high conductivity. In this research, high conductivity is owned by LTO-1% C/SiOC. In addition, CV and CD performance tests were performed where the highest specific capacity was obtained in the LTO-5%/SiOC samples.

scholarly journals The effect of activated carbon and silicon oxycarbide as anode materials on lithium-ion battery

2018 ◽  
Vol 67 ◽  
pp. 03027 ◽  
Author(s):  
Bambang Priyono ◽  
Natasha Chandri Egieara ◽  
Anne Zulfia Syahrial ◽  
Chairul Hudaya ◽  
Achmad Subhan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Lithium Ion Battery ◽  
Performance Test ◽  
Silicone Oil ◽  
Lithium Ion ◽  
High Volume ◽  
Silicon Oxycarbide ◽  
Sem Images ◽  
Porous Microstructure ◽  
Prime Condition

SiOC@C is a lithium-ion battery (LIB) anode candidate that is expected to suppress the high volume expansion of Si by the presence of activated carbon as a buffer layer. Silicon oxycarbide (SiOC) was obtained from phenyl-rich silicone oil through pyrolysis at 900°C with flowing Ar gas. The variation of samples used were 4 and 10wt.% SiOC and a pure carbon sample was also prepared for comparison. SEM images show a porous microstructure with a few chunks of agglomerate present. According to Brunner-Emmet-Teller (BET) test, the largest surface area of 542.738 m2/g was obtained at 10wt.%SiOC. Based on the performance test result, the highest discharge capacity of 223.3 mAh/g was obtained at the mentioned prime condition.

Porous Activity of Biomass-Activated Carbon Enhanced by Nitrogen-Dopant Towards High-Performance Lithium Ion Hybrid Battery-Supercapacitor

2021 ◽  
Author(s):  
Juan Yu ◽  
Xuyang Wang ◽  
Jiaxin Peng ◽  
Xuefeng Jia ◽  
Linbo Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Pore Structure ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Utilization Efficiency ◽  
Energy Storage Devices ◽  
Storage Devices

Abstract Biomass-activated carbon materials are promising electrode materials for lithium-ion hybrid capacitors (LiCs) because of their natural hierarchical pore structure. The efficient utilization of structural pores in activated carbon is very important for their electrochemical performance. Herein, porous biomass-activated carbon (PAC) with large specific surface area was prepared using a one-step activation method with biomass waste as the carbon source and ZnCl2 as the activator. To further improve its pore structure utilization efficiency, the PAC was doped with nitrogen using urea as the nitrogen source. The experimental results confirmed that PAC-1 with a high nitrogen doping level of 4.66% exhibited the most efficient pore utilization among all the samples investigated in this study. PAC-1 exhibited 92% capacity retention after 8000 cycles, showing good cycling stability. Then, to maximize the utilization of high-efficiency energy storage devices, LiNi0.8Co0.15Al0.05O2 (NCA), a promising cathode material for lithium-ion batteries with high specific capacity, was compounded with PAC-1 in different ratios to obtain NCA@PC composites. The NCA@PC-9 composite exhibited excellent capacitance in LiCs and an energy density of 210.9 Wh kg-1 at a high power density of 13.3 kW kg-1. These results provide guidelines for the design of high-performance and low-cost energy storage devices.

scholarly journals Silicon Oxycarbide-Graphite Electrodes for High-Power Energy Storage Devices

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4302
Author(s):  
Dominik Knozowski ◽  
Magdalena Graczyk-Zajac ◽  
Grzegorz Trykowski ◽  
Monika Wilamowska-Zawłocka
Keyword(s):  
Energy Storage ◽  
High Power ◽  
Sol Gel ◽  
Lithium Ion ◽  
Silicon Oxycarbide ◽  
Energy Storage Devices ◽  
Graphite Composite ◽  
Storage Devices ◽  
Lithium Ion Capacitor ◽  
Graphite Composites

Herein we present a study on polymer-derived silicon oxycarbide (SiOC)/graphite composites for a potential application as an electrode in high power energy storage devices, such as Lithium-Ion Capacitor (LIC). The composites were processed using high power ultrasound-assisted sol-gel synthesis followed by pyrolysis. The intensive sonication enhances gelation and drying process, improving the homogenous distribution of the graphitic flakes in the preceramic blends. The physicochemical investigation of SiOC/graphite composites using X-ray diffraction, 29Si solid state NMR and Raman spectroscopy indicated no reaction occurring between the components. The electrochemical measurements revealed enhanced capacity (by up to 63%) at high current rates (1.86 A g−1) recorded for SiOC/graphite composite compared to the pure components. Moreover, the addition of graphite to the SiOC matrix decreased the value of delithiation potential, which is a desirable feature for anodes in LIC.

FACILE SOL–GEL SYNTHESIS OF Li[Li0.2Mn0.56Ni0.16Co0.08]O2 AS IMPROVED CATHODE MATERIAL FOR LITHIUM-ION BATTERIES

2013 ◽  
Vol 01 (04) ◽  
pp. 1340015
Author(s):  
WENJUAN HAO ◽  
HAN CHEN ◽  
YANHONG WANG ◽  
HANHUI ZHAN ◽  
QIANGQIANG TAN ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Sol Gel ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Electrochemical Performances ◽  
Acetate Tetrahydrate ◽  
Li Ion Batteries ◽  
Gel Method ◽  
Sol Gel Method ◽  
Li Ion

Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 cathode materials for Li -ion batteries were synthesized by a facile sol–gel method followed by calcination at various temperatures (700°C, 800°C and 900°C). Lithium acetate dihydrate, manganese (II) acetate tetrahydrate, nickel (II) acetate tetrahydrate and cobalt (II) acetate tetrahydrate are employed as the metal precursors, and citric acid monohydrate as the chelating agent. For the obtained Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 materials, the metal components existed in the form of Mn 4+, Ni 2+ and Co 3+, and their molar ratio was in good agreement with 0.56 : 0.16 : 0.08. The calcination temperature played an important role in the particle size, crystallinity and further electrochemical properties of the cathode materials. The Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 material calcined at 800°C for 6 h showed the best electrochemical performances. Its discharge specific capacities cycled at 0.1 C, 0.5 C, 1 C and 2 C rates were 266.0 mAh g−1, 243.1 mAh g−1, 218.2 mAh g−1 and 192.9 mAh g−1, respectively. When recovered to 0.1 C rate, the discharge specific capacity was 260.2 mAh g−1 and the capacity loss is only 2.2%. This work demonstrates that the sol–gel method is a facile route to prepare high performance Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 cathode materials for Li -ion batteries.

Study on the Synthesis of Lithium Titanate Compound as Anode Material for Lithium Ion Battery

2010 ◽  
Vol 44-47 ◽  
pp. 2172-2175
Author(s):  
Yan Li Ruan ◽  
Bo Wen Cheng
Keyword(s):  
Electrochemical Performance ◽  
Great Influence ◽  
Performance Testing ◽  
Lithium Ion ◽  
Lithium Titanate ◽  
Raw Material ◽  
Cycle Performance ◽  
Particle Size Distribution Measurement ◽  
Xrd Patterns ◽  
Synthesized Materials

Lithium titanate compound, Li4Ti5O12 was prepared by a solid state reaction. The raw material, the calcination time, the atmosphere of the reaction and other conditions were investigated. The crystal structure and the electrochemical performance of the synthesized materials were characterized by X-ray powder diffraction (XRD), laser particle-size distribution measurement (LSD), and electrochemical performance testing. The XRD patterns showed peaks attributable to Li4Ti5O12 phase for the sample prepared by LiOH•H2O, while there was impurity peak in the pattern of the sample prepared by Li2CO3. The precursor was sintered at various times of 12h and 24h at 800 °C. The galvanostatically charge and discharge tests show that the capacity and the cycle performance of the latter is obviously more excellent. The atmosphere of the reaction hasn't exerted a great influence on the performance of the material.

TiNb2O7 nanorods as a novel anode material for secondary lithium-ion batteries

2016 ◽  
Vol 09 (06) ◽  
pp. 1642004 ◽  
Author(s):  
Lei Hu ◽  
Chunfu Lin ◽  
Changhao Wang ◽  
Chao Yang ◽  
Jianbao Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Average Length ◽  
Sol Gel ◽  
Specific Capacity ◽  
Sodium Dodecyl ◽  
Rate Capability ◽  
Lithium Ion ◽  
Average Diameter ◽  
Electrochemical Performances ◽  
Text Type

TiNb2O7 nanorods have been successfully fabricated by a sol–gel method with a sodium dodecyl surfate (SDS) surfactant. X-ray diffraction indicates that the TiNb2O7 nanorods have a Ti2Nb[Formula: see text]O[Formula: see text]-type crystal structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results show that the nanorods have an average diameter of [Formula: see text][Formula: see text]100[Formula: see text]nm and an average length of [Formula: see text][Formula: see text]300[Formula: see text]nm. As a result of such nanosizing effect, this new material exhibits advanced electrochemical performances in terms of specific capacity, rate capability and cyclic stability. At 0.1[Formula: see text]C, it delivers a large first-cycle discharge/charge capacity of 337/279 mAh g[Formula: see text]. Its capacities remain 248, 233, 214, 182, 154 and 122[Formula: see text]mAh g[Formula: see text] at 0.5, 1, 2, 5, 10 and 20[Formula: see text]C, respectively. After 100 cycles, its capacity at 10[Formula: see text]C remains 140[Formula: see text]mAh g[Formula: see text] with large capacity retention of 91.0%.

scholarly journals Al Ions Doping Effect on The Diffusion Coefficient and Capacity of Li4Ti5O12 (Lithium Titanate, LTO) in Lithium-Ion Battery Anode

2020 ◽  
pp. 51-57
Author(s):  
Slamet Priyono ◽  
Lufthansyah Daniswara ◽  
Rahma Alfia Khoiri ◽  
Yayuk Astuti
Keyword(s):  
Diffusion Coefficient ◽  
Sol Gel ◽  
Lithium Ion ◽  
Lithium Titanate ◽  
Test Results ◽  
Lithium Metal ◽  
Al Doping ◽  
Polarization Voltage ◽  
And Diffusion ◽  
Battery Anode

Li4Ti5O12 (LTO) anode doped with Al ions with varying concentrations (Al = 0; 0.005; 0.015; 0.03; 0.045) was successfully synthesized using the sol-gel method. Al-doped LTO samples were obtained through the sintering of gel at 850oC for 4 hours under a normal atmosphere. Electrochemical performance such as charge-discharge capacity and diffusion coefficient were characterized using an automatic battery cycler. The cells consist of electrode sheets (LTO doping Al) as a working electrode, lithium metal as the counter electrode, Celgard film as the separator, and LiPF6 as an electrolyte. Cyclic voltammetry test results show that a greater scan rate results in decreased capacity and greater polarization voltage. In addition, an increase in concentrations used in Al doping on LTO causes capacity, and the diffusion coefficient tends to decrease.

scholarly journals Biphenyl-Bridged Organosilica as a Precursor for Mesoporous Silicon Oxycarbide and Its Application in Lithium and Sodium Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 754 ◽  
Author(s):  
Manuel Weinberger ◽  
Po-Hua Su ◽  
Herwig Peterlik ◽  
Mika Lindén ◽  
Margret Wohlfahrt-Mehrens
Keyword(s):  
Sol Gel ◽  
Lithium Ion ◽  
Soxhlet Extraction ◽  
Structural Features ◽  
Silicon Oxycarbide ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Mesoporous Silicon ◽  
Pluronic P123 ◽  
Interesting Candidate

Silicon oxycarbides (SiOC) are an interesting alternative to state-of-the-art lithium battery anode materials, such as graphite, due to potentially higher capacities and rate capabilities. Recently, it was also shown that this class of materials shows great prospects towards sodium ion batteries. Yet, bulk SiOCs are still severely restricted with regard to their electrochemical performance. In the course of this work, a novel and facile strategy towards the synthesis of mesoporous and carbon-rich SiOC will be presented. To achieve this goal, 4,4′-bis(triethoxysilyl)-1,1′-biphenyl was sol–gel processed in the presence of the triblock copolymer Pluronic P123. After the removal of the surfactant using Soxhlet extraction the organosilica material was subsequently carbonized under an inert gas atmosphere at 1000 °C. The resulting black powder was able to maintain all structural features and the porosity of the initial organosilica precursor making it an interesting candidate as an anode material for both sodium and lithium ion batteries. To get a detailed insight into the electrochemical properties of the novel material in the respective battery systems, electrodes from the nanostructured SiOC were studied in half-cells with galvanostatic charge/discharge measurements. It will be shown that nanostructuring of SiOC is a viable strategy in order to outperform commercially applied competitors.

Optimizing Performance of ZnO Nanorod and Activated Carbon as a Composite Anode for Lithium-Ion Batteries

2020 ◽  
Vol 1000 ◽  
pp. 31-40
Author(s):  
Bambang Priyono ◽  
Ananta Riezky Bachtiar ◽  
Hugo Abraham ◽  
Mohammad Ridho Nugraha ◽  
Faizah ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrochemical Impedance ◽  
Zno Nanorods ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Porosity ◽  
Composite Anode ◽  
X Ray Diffraction ◽  
Stable Performance

To obtain the high specific capacity anode for Lithium-ion battery with stable performance is conducted by synthesizing a composite anode of ZnO-nanorods (ZnO-NR) and as a matrix is the activated carbon (AC). In this study, ZnO-NR synthesized a process that uses basic materials hexamethylenetetramine (HMTA) and zinc oxide. Activated carbon has been activated because it has high porosity and good electrical conductivity properties. Variable used is the percentage of ZnO-NR, which is 30wt%, 40wt%, and 50wt%. Characterization of the samples was examined using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Brunauer–Emmett–Teller (BET). The battery performance of the samples was obtained by Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV), and Charge-Discharge (CD) testing after being assembled into coin cell batteries. This study discusses the effect of adding activated carbon to ZnO NR composites. The results showed that the ZnO-NR30/AC has the highest specific capacity of 270.9 mAh g-1. According to Brunner-Emmet-Teller (BET) test, the largest surface area was 631.685 m2 g-1. Electrochemical performance is the best obtained by ZnO-NR30/AC.

scholarly journals Activated Carbon-Decorated Spherical Silicon Nanocrystal Composites Synchronously-Derived from Rice Husks for Anodic Source of Lithium-Ion Battery

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1055 ◽  
Author(s):  
Sankar Sekar ◽  
Abu Talha Aqueel Ahmed ◽  
Akbar I. Inamdar ◽  
Youngmin Lee ◽  
Hyunsik Im ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Lithium Ion Battery ◽  
Silicon Nanocrystals ◽  
Specific Capacity ◽  
Reduction Process ◽  
Lithium Ion ◽  
Nanocrystalline Silicon ◽  
Green Energy ◽  
High Porosity ◽  
Rice Husks

The nanocomposites of activated-carbon-decorated silicon nanocrystals (AC<nc-Si>AC) were synchronously derived in a single step from biomass rice husks, through the simple route of the calcination method together with the magnesiothermic reduction process. The final product, AC<nc-Si>AC, exhibited an aggregated structure of activated-carbon-encapsulated nanocrystalline silicon spheres, and reveals a high specific surface area (498.5 m2/g). Owing to the mutualization of advantages from both silicon nanocrystals (i.e., low discharge potential and high specific capacity) and activated carbon (i.e., high porosity and good electrical conductivity), the AC<nc-Si>AC nanocomposites are able to play a substantial role as an anodic source material for the lithium-ion battery (LIB). Namely, a high coulombic efficiency (97.5%), a high discharge capacity (716 mAh/g), and a high reversible specific capacity (429 mAh/g after 100 cycles) were accomplished when using AC<nc-Si>AC as an LIB anode. The results advocate that the simultaneous synthesis of biomass-derived AC<nc-Si>AC is beneficial for green energy-storage device applications.

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