Sintesis Dan Karakterisasi Material Aktif Katoda Lithium Mangan Fosfat Dengan Doping Cobalt (LiMnxCo1-xPO4) Melalui Solid State Reaction

Shavira, Rheina Aurely (2019) Sintesis Dan Karakterisasi Material Aktif Katoda Lithium Mangan Fosfat Dengan Doping Cobalt (LiMnxCo1-xPO4) Melalui Solid State Reaction. Undergraduate thesis, InstitutTeknologi Sepuluh Nopember.

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Abstract

Material komposit lithium mangan fosfat dengan coating karbon (LiMnxCo1-xPO4/C) dan variasi doping ion Co (1-x=0,1; 0,2; 0,3) sebagai katoda baterai ion lithium telah berhasil disintesis dengan metode solid state reaction menggunakan teknik wet ball milling. Bahan baku MnO2, H3PO4, Co2O3 dimilling dan dikalsinasi 7 jam pada suhu 500oC, dicampur dengan LiOH·H2O dan sumber karbon 12wt% dengan cara dimilling lalu disintering 9 jam pada suhu 750oC dengan gas inert N2. Slurry dicoating pada lembar Aluminium dengan ketebalan 0,008mm. Serbuk dan lembaran yang telah disintesis dikarakterisasi dengan menggunakan XRD, SEM-EDS, PSA, CV, CD dan EIS. Olivine LiMnPO4 merupakan fasa utama yang teramati. Terdapat fasa sekunder pada semua sampel. Penambahan konsentrasi doping Co menghambat pertumbuhan fasa olivine dan memicu pertumbuhan fasa Li4O7P2 serta meningkatkan nilai konduktifitas elektrik, namun menurunkan nilai konduktifitas ionic baterai LMP. Secara keseluruhan, baterai dengan variasi doping Co 0,3 pada katoda LMP/C memiliki konduktivitas total yang paling tinggi dengan nilai sebesar 4.80×10-4 S/cm dan memiliki performa terbaik diantara variasi doping lainnya dengan kapasitas spesifik 137-141 mAHr/g. ================================================================================ A cathode material, lithium manganese phosphate composite with carbon coating (LiMnxCo1-xPO4/C) and Co doping ions (1-x = 0.1; 0.2; 0.3) for lithium ion battery has been successfully synthesized by the solid- state reaction method using wet ball milling technique. The raw materials of MnO2, H3PO4, Co2O3 are milled and calcined for 7 hours at 500oC, then mixed with LiOH·H2O and carbon source 12wt% by milling and sintered 9 hours at 750oC N2 inert gas atmosphere. Slurry coated on Aluminum sheet with a thickness of 0.008mm. The synthesized powders and sheets were characterized using XRD, SEM-EDS, PSA, CV, CD, and EIS. Olivine LiMnPO4 is the main phase observed. There is a secondary phase in all samples. The addition of Co doping concentration inhibits the growth of the olivine phase and triggers the growth of the Li4O7P2 phase, also increases the value of electrical conductivity, but decreases the ionic conductivity value of LMP batteries. Overall, LMP/C cathode batteries with Co doping variations of 0.3 give the highest conductivity with a value of 4.80 × 10-4 S/cm and have the best performance among the other doping variations with a specific capacity of 137-141 mAHr/g.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Baterai ion lithium, Kapasitas spesifik, Konduktivitas ionik dan elektrik, Lithium Manganese Phosphate, Solid State reaction, Electric and ionic conductivity, Lithium ion battery, Lithium Manganese Phosphate, Specific capacity.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2921 Lithium cells.
T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User: Rheina Aurely Shavira
Date Deposited: 04 Aug 2020 06:53
Last Modified: 04 Aug 2020 06:53
URI: https://repository.its.ac.id/id/eprint/76824

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