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Journal : Jurnal Sains Materi Indonesia

 1 
ANALISIS NUMERIK HOOKE JEEVES-RUNGE KUTTA UNTUK MENENTUKAN PERSAMAAN LAJU REAKSI POLIMERISASI PIROL Gunawan, Indra; Sulistyo, Hary; Rochmadi, Rochmadi
Jurnal Sains Materi Indonesia Vol 3, No 1: OKTOBER 2001
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.731 KB) | DOI: 10.17146/jusami.2001.3.1.5249

Abstract

ANALISIS NUMERIK HOOKEJEEVES-RUNGEKUTTA UNTUK MENENTUKAN PERSAMAAN LAJU REAKSI POLIMERISASI PIROL. Telah dilakukan analisis numerik dengan menggunakan metode Hooke Jeeves yang dikombinasikan dengan metoda Runge Kutta, untuk menentukan model yang paling tepat dari persamaan laju reaksi polimerisasi pirol secara kimia. Polimerisasi kimia pirol dijalankan di dalam larutan FeCl3/pirol pada nisbah pereaksi 1,62 mol/mol dan 2,18 mol/mol dengan suhu reaksi 28℃, 40℃, 50℃, dan 60℃. FeCl3 berfungsi sebagai oksidator untuk membentuk kation pirol yang akan siap berpolimerisasi. Dilakukan analisis numerik dari dua model persamaan laju reaksi yang diturunkan dari persamaan-persamaan reaksi pemicuan, perambatan, dan penghentian. Dari analisis numerik di terhadap konsentrasi kation pirol.
SYNTHESIS AND CHARACTERIZATION OF LiFePO4/PPy/CLAY COMPOSITE AS CATHODE MATERIAL FOR Li-ION BATTERY Gunawan, Indra; P, Yustinus; Sudaryanto, Sudaryanto; Ginting, Jadigia
Jurnal Sains Materi Indonesia Vol 21, No 2: JANUARY 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (695.879 KB) | DOI: 10.17146/jsmi.2020.21.2.5805

Abstract

SYNTHESIS AND CHARACTERIZATION OF LiFePO4/PPy/CLAY COMPOSITE AS CATHODE MATERIAL FOR Li-ION BATTERY. Conductor polymers have been used previously as a conducting agent or carbon source in various sol-gel and solid state methods to increase the conductivity of LiFePO4. The composite of LiFePO4/PPy/Clay were synthesized by mixing LiFePO4 and clay with a Ppy solution. The characterizations were done by using X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM) and LCR meter respectively. From XRD analysis it could be deduced that LiFePO4 has an ordered olivine structure with a Pnma space group. The SEM images provide clear evidence that small crystal particles of LiFePO4 either coat the surface of the clay particles or lie among them. These LiFePO4 particles have a small particle size (100–500 nm). With the increasing of LiFePO4 content, these small crystal particles at the surface or among the clay particles are increased. Increasing the PPy content to increase the conductivity of the material obtained. With the addition of clay from 5 to 10 wt. %, the DC conductivity of the blends is clearly observed to increase up to three orders of magnitude.
Co-Authors Abd Wahid Agustina Erni, Agustina agustini, lila Anesia, Regita Ari Handayani Aulia, Defni B. Tambunan, Holpan Torang Bambang Sri Anggoro Budi Sukoco, Nawanto dadi santoso Damanik, Bahrudi Efendi Damanik, Meilani Damanik, Roni Andre Syahputra Damayanti, Elok Darsono, Farida Lanawati Desak Nyoman Dewi Indira Laksmi Djazuly Chalidyanto Dwi Ratna Sari, Dwi Ratna Eka Irawan Endang Widuri Asih Farid Ahmadi Fitri Anggraini, Fitri Fitriza, Rozi Ginting, Crismis Novalinda Girsang, Ermi GITA PERMATA LIANSARI Gultom, Devi Hadmar, Ahmad Muhardin Hamzari Hamzari Harsono Taropratjeka Hartama, Dedy Hartati, Puspita Hary Sulistyo Heru Satria Tambunan, Heru Satria I Gusti Ngurah Bagus Trilaksana Irfan Sudahri Damani, Irfan Sudahri Jadigia Ginting Jalaludin Jalaludin Julius Santony Kirana, Ika Okta Kirana, Ika Okta Liliek S. Hermanu, Liliek S. Mahdi Bahar Mahyudin Mahyudin Manurung, Herman Melita ., Melita Mudayana, Ahmad A Muhammad Zarlis, Muhammad Nasution, Sri Lestari Ramadhani Nasution, Zulaini Masruro Nazila, Wa Ode Ning Iswati Ningsih, Sri Rahayu Ninik Setyowati Ormuz Firdaus P, Yustinus Parlina , Iin Parlina, Iin Petrus Wisnubroto Poningsih Poningsih, Poningsih Pribuiarta N. Sitepu, Pribuiarta N. purba, lia cintia Purba, Roimal Hafizi Purnomo, Dentaruni Cahya rahmayani, sri Rahul, Mirza Ria Fahrina, Ria Rochmadi Rochmadi Rohidin Mersyah, Rohidin Rusdarti - Saeful Yusuf Salam Sitio, Agus Saputra, Widodo Sari, Aprilia Mayang Siahaan, Septri Siahaan, Septri Wanti Siahaan, Septri Wanti Sianipar, Kristin Sianipar, Kristin Daya Rohani Sianipar, Kristin Daya Rohani Silalahi, Robertus Siregar, Marina Siregar, Zulia Almaida Sumarno . Sumijan Sumijan Sundari Retno Andani Teguh Adiprasetyo TITI JUHAETI V M, Paul Wahyuningrum, Asrifah Widodo S Pranowo Widodo Saputra Wijaya, Putra Adi Wuri Utami Yelmi, Yelmi Yofita Sandra, S.Pd., M.Pd., Zico Farlin, Dr. Budiwirman, M.Pd.,