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The Effect of Al2O3 Doped and Carbon Coated Li4Ti5O12 on Structures, Morphology and Electrochemical Performance Priyono, Slamet
Journal of Technomaterial Physics Vol. 2 No. 1 (2020): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v2i1.5266

In this research, Li4Ti5O12 anode with doping Al2O3 and carbon coating was made to determine the effect of doping Al2O3 and carbon coating on crystal structure, morphology and electrochemical performance. Li4Ti5O12 anode material consisting of LiOH.H2O and TiO2 was made with various samples of LTO without doping, LTO doped carbon, LTO doping Al2O3 and carbon using the solid state reaction method. All raw materials are mixed and milled using a Planetary Ball Miller for 2 hours then crushed to become a precursor to Li4Ti5O12. The Li4Ti5O12 precursor was sintered at 850Â°C for 4 hours. The final product was characterized using X-Ray Diffraction (XRD) to determine the formation of Li4Ti5O12 phases, Scanning Electron Microscopy (SEM) to analyze the morphology formed, and Cyclic Voltammetry to determine electrochemical performance. The results of XRD characterization were formed in the Lithium Titanium Oxide (Li4Ti5O12), Dilithium Titanate (Li2TiO3), and Rutile (TiO2) phases. The SEM characterization results on LTO doping carbon, LTO doping Al2O3 and carbon showed a coarser texture compared to the LTO without doping which had a fine texture. The electrochemical performance produced in LTO coating carbon has a slender redox peak in the first cycle, this shows that LTO coating carbon has good electrochemical performance compared to the Al2O3 and carbon doping LTO samples.

Al Ions Doping Effect on The Diffusion Coefficient and Capacity of Li4Ti5O12 (Lithium Titanate, LTO) in Lithium-Ion Battery Anode Priyono, Slamet; Daniswara, Lufthansyah; Khoiri, Rahma; Astuti, Yayuk
http://dx.doi.org/10.31427/IJSTT.2020.3.2.3
Publisher : Unijourn Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.

SINTESIS DAN KARAKTERISASI Li4Ti5O12 YANG DILAPISI KARBON DENGAN METODE SOLID STATE REACTION UNTUK ANODA ION LITHIUM Lediliocza Lediliocza; Sitti Ahmiatri Saptari; Slamet priyono
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.3
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v3i2.17271

Telah dilakukan sintesis material anoda Li4Ti5O12 dilapisi karbon melalui metode solid state, dengan bahan baku LiOH H2O dan TiO2. sintesis dilakukan dengan variasi sumber karbon yaitu Super. P, Tapioka, dan karbon aktif Food grade. Prekursor Li4Ti5O12 disinter pada suhu 800o C selama 4 jam pada atmosfer udara bebas. Sedangkan proses pelapisan karbon dilakukan dengan milling basah dan sinter pada suhu 600o C selama 1 jam pada atmosfer N2. Karakterisasi yang dilakukan meliputi analisa untuk melihat perbedaan performa elektrokimia pada variasi sumber karbon yang digunakan, diantaranya analisa XRD (X-ray Diffraction) untuk mengetahui pembentukan fasa Li4Ti5O12, FESEM ( Field Emission Scanning Electron Microscopy) untuk menganalisa morfologi yang terbentuk, dan untuk mengetahui performa elektrokimia dilakukan pengujian Cyclic voltammetry, charge-discharge dan Electrochemical Impedance Spectroscopy (EIS). Hasil karaktrisasi terbentuk fasa Lithium titanium oxide (Li4Ti5O12) sebesar 96,1% dan fasa rutile (TiO2) sebesar 3,1%. Hasil karakterisasi FE-SEM menunjukan morfologi penyebaran karbon pada anoda Li4Ti5O12/C dengan sumber karbon Super P, paling homogen dbandingkan dengan anoda Li4Ti5O12/C dengan sumber karbon Tapioka kemudian anoda Li4Ti5O12/C dengan sumber karbon food grade. Performa elektrokimia yang dihasilkan Li4Ti5O12/C dengan sumber karbon Tapioka memiliki nilai konduktivitas elektronik dan konduktivitas ionik paling besar, dan menunjukan difusi ion lithium yang sangat kecil, namun memiliki nilai koefesien difusi 2,54 × 10−13 cm-2 s-1 mendekati besar koefesien difusi Li4Ti5O12/C (Sp) sebesar 2,61 × 10−13 cm-2 s1, serta memiliki nilai kapasitas discharge 161.05 mAh/g, mendekati nilai kapasitas discharge Li4Ti5O12/C (Sp) sebesar 167.84 mAh/g.

PEMBUATAN ANODA Li4Ti5O12 DAN STUDI PENGARUH KETEBALAN ELEKTRODA TERHADAP PERFORMA ELEKTROKIMIA BATERAI ION LITHIUM Slamet Priyono; Mia Aulia Dhika; Kerista Sebayang
Jurnal Sains Materi Indonesia Vol 17, No 4: JULI 2016
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2016.17.4.4175

PEMBUATAN ANODA Li4Ti5O12 DAN STUDI PENGARUH KETEBALAN ELEKTRODA TERHADAP PERFORMA ELEKTRO KIMIA BATERAI ION LITHIUM. Telah dilakukan pembuatan serbuk Li4Ti5O12 dan studi pengaruh ketebalan terhadap performa elektrokimia baterai ion lithium. Li4Ti5O12 disintesis dari bahan baku LiOH.H2O dan TiO2 dengan metode metalurgi serbuk. Lembaran elektroda dibuat dengan mencampurkan serbuk Li4Ti5O12 dengan PVDF, AB serta pelarut N-N,DMAC hingga menjadi lumpur dan dilapiskan pada Cu foil dengan variasi ketebalan 50 µm, 80 µm, dan 120 µm. Dari lembaran tersebut dibuat baterai setengah sel dengan menggunakan elektroda referensi metalik lithium dan elektrolit LiPF6. Karakterisasi yang dilakukan meliputi X-Ray Diffraction (XRD) untuk mengetahui struktur kristal dan fasa serbuk dan performa setangah sel baterai dilakukan dengan uji Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV) dan Charge/Discharge (CD). Dari hasil pengujian XRD menunjukkan ada dua fasa yang terbentuk, yaitu fasa Li4Ti5O12 sebesar 77,3 % dengan struktur kristal cubic dan fasa TiO2 rutile sebesar 22,7% dengan struktur kristal tetragonal. Hasil konduktivitas tertinggi pada lembaran anoda dengan menggunakan Electrochemical Impedance Spectroscopy (EIS) adalah 3,66 x 10-5 S/cm pada ketebalan 50 µm. Hasil CV menunjukkan semakin tipis lembaran anoda maka semakin cepat interkalasi dan de-interkalasi. Sedangkan, hasil CD menunjukkan bahwa ketebalan lapisan mempengaruhi nilai kapasitas spesifik, semakin tebal lapisan semakin menurun nilai kapasitas spesifiknya. Kapasitas sel baterai yang baik diperoleh pada ketebalan lapisan 50 µm, dengan kapasitas charge sebesar 146,6 mAh/g dan kapasitas discharge sebesar 146,09 mAh/g

SYNTHESIS AND CHARACTERIZATION OF Li4Ti5O12 WITH SOL GEL METHOD AS A LITHIUM ION-BATTERY ANODE MATERIAL Slamet Priyono; Ilma Nuroniah; Achmad Subhan; Edi Sanjaya; Bambang Prihandoko
Jurnal Sains Materi Indonesia Vol 20, No 2: JANUARY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

SYNTHESIS AND CHARACTERIZATION OF Li4Ti5O12 WITH SOL GEL METHOD AS A LITHIUM ION-BATTERY ANODE MATERIAL. Synthesis of anode Li4Ti5O12 material has been carried out using the sol gel method. The synthesis is carried out with variations in sintering temperatures at 500 oC, 600 oC, 700 oC dan 800 oC. Characterization carried out includes testing thermal analysis to determine the optimum temperature for sintering, XRD (X-ray Diffraction) to find out the phase formation of Li4Ti5O12, Scanning electron microscope (SEM) to analyse the morphology formed, testing Cyclic voltammetry, charge-discharge and Electrochemical Impedance Spectroscopy (EIS) is carried out to find out the elec- trochemical performance. From the results of characterization of thermal and XRD analyses, the optimum temperature for synthesis is 800oC with small impurity content. The results of SEM characterization show that the morphology of the sample is not homogeneous, and the particles are agglomerated. The resulting electrochemical performance increases along with the increase in temperature for sintering, including voltammogram graphs, diffusion coefficient values, electrical conductivity and charge-discharge capacity. Of all the samples, the LTO sintered at 800oC shows good electrochemical performance with a sharp and good voltammogram graph, diffusion coefficient value of lithium ion is 1.58 × 10-9 cm2s-1, electrical conductivity of 0.6282 S/cm and the discharge capacity given is 78,07 mAh/g.

Electrochemical Performance of Li4-xTi5CuxO12 for Lithium Ion Capacitor Applications Ahmad Sohib; Achmad Subhan; Wahyu Bambang Widayatno; Slamet Priyono; Chairul Hudaya; Ilma Nuroniah; Sherly Novia Sari; Bambang Prihandoko
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.43-50

Lithium titanat (LTO) has attracted considerable attention since it has unique characteristics for energy storage application. Doped LTO is one of approach to improve LTO performance. To date, doped LTO performance in full cell lithium ion capacitor has rarely been discussed. This study is aimed to synthesize Cu-doped LTO via solid state reaction and high energy milling and investigate its electrochemical performance in full cell of lithium ion capacitor. Cu-doped LTO is synthesized via solid state method with high energy milling. Diffraction pattern exhibit that Cu-doped LTO has been successfully synthesized even some impurities such as Baddeleyite, ZrO2, and Li2O appear in each sample. Cyclic voltammogram profile of half-cell based Cu-doped LTO shows that the oxidation and reduction peaks are declined due to its impurities contain. electrical resistance of LTO and Cu-doped LTO becomes smaller as increasing dopant contain while charge transfer resistance is higher. Full cell performance of LIC represent that undoped LTO//Activated carbon shows higher capacitance, namely 430 µFg-1 at specific current of 50 mAg-1than that of 2.5%-Cu-doped LTO//AC holds 15 µFg-1.

Electrochemical Performance of Li4-xTi5CuxO12 for Lithium Ion Capacitor Applications Ahmad Sohib; Achmad Subhan; Wahyu Bambang Widayatno; Slamet Priyono; Chairul Hudaya; Ilma Nuroniah; Sherly Novia Sari; Bambang Prihandoko
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.43-50

Lithium titanat (LTO) has attracted considerable attention since it has unique characteristics for energy storage application. Doped LTO is one of approach to improve LTO performance. To date, doped LTO performance in full cell lithium ion capacitor has rarely been discussed. This study is aimed to synthesize Cu-doped LTO via solid state reaction and high energy milling and investigate its electrochemical performance in full cell of lithium ion capacitor. Cu-doped LTO is synthesized via solid state method with high energy milling. Diffraction pattern exhibit that Cu-doped LTO has been successfully synthesized even some impurities such as Baddeleyite, ZrO2, and Li2O appear in each sample. Cyclic voltammogram profile of half-cell based Cu-doped LTO shows that the oxidation and reduction peaks are declined due to its impurities contain. electrical resistance of LTO and Cu-doped LTO becomes smaller as increasing dopant contain while charge transfer resistance is higher. Full cell performance of LIC represent that undoped LTO//Activated carbon shows higher capacitance, namely 430 µFg-1 at specific current of 50 mAg-1than that of 2.5%-Cu-doped LTO//AC holds 15 µFg-1.

PENGARUH PENAMBAHAN SERBUK Al2O3 DAN Na2CO3 PADA KARAKTER TERMAL PREKUSOR Li4Ti5O12 Slamet Priyono; Bambang Prihandoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.757 KB)

Study on the effect of adding Al2O3 and Na2CO3 powder on thermal characteristic of Li4Ti5O12 precusor have been done. Li4Ti5O12 synthesized by using a mixture of Li2CO3 and TiO2 as raw materials through solid state method with calcination at 700 Â°C. The addition of a bit of the other material will affect the characteristics of the material, especially on the thermal properties. The study consisted of two variations, namely, Al2O3 powder was added to the mixture of Li2CO3/TiO2 and the second variation is Al2O3 powder and Na2CO3 was added to the mixture of Li2CO3/TiO2 and then analyzed by Simulthaneous Thermal Analysis (STA). Measurement of thermal properties include the decomposition temperature, enthalpy, and the determination of the calcination temperature. The measurement results showed that the addition of Al2O3 in the precursor decomposition temperature of Li4Ti5O12 provide 659 Â° C, the enthalpy of 5.675 kJ / g and a calcination temperature of about 750 Â° C. While the addition of Al2O3 and Na2CO3 on Li4Ti5O12 precursor gave decomposition temperature of 560 Â° C, the enthalpy of 5.672 kJ / g and a calcination temperature of about 680 Â° C. The addition of Al2O3 powder showed an increase of energy required for the synthesis while the addition of Na2CO3 powder showed a decrease in the energy required for the synthesis process. Keywords: thermal properties of Al2O3, STA, Na2CO3, Li4Ti5O12.

The Effect of LiBOB Addition on Solid Polymer Electrolyte (SPE) Production based PVDF-HFP/TiO2/LiTFSI on Ionic Conductivity for Lithium-Ion Battery Applications Titik Lestariningsih; Qolby Sabrina; Christin Rina Ratri; Achmad Subhan; Slamet Priyono
Jurnal Kimia Sains dan Aplikasi Vol 25, No 1 (2022): Volume 25 Issue 1 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

SPE (Solid Polymer Electrolyte) is an alternative to substitute conventional liquid electrolytes as it has a better safety level and has been produced using the solution casting method. An effort to increase the SPE conductivity of the PVDF-HFP/TiO2/ LiTFSI system has been carried out by adding LiBOB as an additive. LiBOB (lithium bis(oxalate) borate) is a salt compound that can interfere with the crystallization process of polymer chains, so it is expected to increase ion conductivity. However, the results showed a decrease in the conductivity from 3.643 x 10-5 S/cm to 8.658 x 10-6 S/cm. These results were proven by the XRD, FTIR, SEM, and TGA characterization. Based on XRD (X-ray Diffraction) analysis, the addition of LiBOB increased the crystallinity phase. The results of the SEM (Scanning Electron Microscope) analysis showed that the pore size was partially reduced, the distance between the pores became longer, and the pore closure occurred due to agglomeration. The FTIR (Fourier Transform Infrared spectroscopy) analysis showed the interaction of LiBOB salts in the PVDF-HFP/LiTFSI/TiO2 system, and based on TGA (Thermogravimetric Analysis) analysis, the addition of LiBOB affected the heat stability of the SPE. The CV (Cyclic Voltammetry) analysis showed that the addition of LiBOB in the SPE system could reduce the reversibility and magnitude of the current.

Synthesis, Characterization, and Electrochemical Performance of Reduced Graphene Oxide-Metal (Cu,Zn)-Oxide Materials Sugianto Sugianto; Ngurah Made Dharma Putra; Endah F. Rahayu; Wahyu B. Widayatno; Cherly Firdharini; Slamet Priyono; Didik Aryanto
Indonesian Journal of Science and Technology Vol 8, No 2 (2023): (ONLINE FIRST) IJOST: September 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i2.56065

The reduced graphene oxide (rGO) and metal (Cu,Zn)-oxide composites were prepared using a one-step hydrothermal technique. The role of (Cu,Zn)-oxide on the physical and electrochemical properties of the composite was investigated. The composite consists of various shapes of ZnO nanoflowers and micro-spheres, as well as Cu-oxide nanoflakes and octahedron-like shapes. The (Cu,Zn)-oxides were formed in between the rGO layers and observed in the rGO-ZnO, rGO-CuO, and rGO-CuO-ZnO composites. The presence of ZnO, CuO, and rGO within the composite structure is also confirmed by the analyses of crystal structure, microstructure, and surface functional groups. Some excess impurities remaining from the surfactant give considerable differences in the electrochemical performance of the composites. The specific capacitance values of the rGO, rGO-ZnO, rGO-CuO, rGO-(0.5CuO-0.5ZnO), and rGO-(0.25CuO-0.75ZnO) composites are 9.32, 58.53, 54.14, 25.21, and 69.27 F/g, respectively. The formation ofa double metal-oxide structure as well as their insertion into the rGO sheet can significantly improve the electrochemical properties of the supercapacitor.

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