Studi Eksperimental Pengaruh Variasi Jenis Separator Terhadap Sifat Mekanik Dan Ketahanan Baterai Struktural Komposit

Satryo, Daffa (2022) Studi Eksperimental Pengaruh Variasi Jenis Separator Terhadap Sifat Mekanik Dan Ketahanan Baterai Struktural Komposit. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Electric vehicle masih berada pada tahap pengembangan terutama pada komponen baterai. Penambahan kapasitas baterai berbanding lurus dengan bertambahnya massa baterai untuk material penyusun baterai yang sama, seperti pada Tesla model S dengan kapasitas baterai 85 kWh yang memiliki berat 25% dari total berat kendaraan. Agar kinerja kendaraan listrik menjadi lebih efisien, diperlukan pengurangan berat kendaraan terutama pada bagian baterai yang dapat diganti dengan baterai struktural komposit yang bertujuan untuk menyediakan mass-less energy storage pada sistem struktur bertenaga listrik, menggunakan bahan ringan yang secara bersamaan dapat mengangkut ion litium serta menyimpan energi listrik sekaligus dapat mentransfer beban mekanis yang tinggi. Metode eksperimen yang digunakan adalah metode sintesa baterai struktural komposit dalam bentuk pouch cell. Komposit tersusun atas beberapa material yaitu Aluminium NMC532 sebagai katoda, copper coated graphite sebagai anoda, dan glass fiber sebagai separator. Matriks sekaligus elektrolit pada komposit ini adalah solid polymer electrolyte (SPE) dengan campuran garam LiFP6 dan EC beserta DMC yang dicampurkan dengan resin dan hardener. Separator yang digunakan pada penelitian ini adalah Whatman, glass fiber WR50, dan glass fiber WR200. Terdapat perbedaan geomteri, jenis struktur, dan densitas. Untuk mengetahui performa mekanik pada setiap variasi ketebalan dan jenis separator, dilakukan pengujian tensile dan flexural. Pengamatan optical microscope selanjutnya dilakukan untuk mempelajari geometri baterai dan pola kegagalannya. Hasil penelitian menunjukan bahwa baterai dengan separator WR200 memiliki strength dan stiffness yang paling tinggi yaitu masing-masing sebesar 15,63 MPa dan 190,96 MPa. Data tersebut dikuatkan dengan hasil tensile test untuk mengetahui kekuatan separator yang didapatkan bahwa WR200 memiliki nilai strength yang paling tinggi yaitu sebesar 1495,62 MPa. Terdapat pengaruh charge-discharge cycle terhadap performa mekanik baterai. Terdapat penurunan performa mekanik yang disebabkan oleh degradasi pada material aktif baterai. Kegagalan pada baterai setelah tensile test didominasi oleh delaminasi, debonding dan adherend failure. Pengaruh curvature terhadap performa elektrokimia ditinjau melalui flexural test, baterai yang masih self-discharge dapat naik kembali voltasenya saat diberi gaya bending. Hasil dari penelitian ini yaitu glass fiber woven roving sangat cocok dijadikan separator pada baterai struktural komposit karena memiliki ketebalan yang tipis dan kekuatan yang tinggi. Baterai struktural komposit ini selain dapat menyimpan dan menyalurkan daya, juga memiliki memiliki kekuatan mekanik yang baik. Selain itu baterai struktural komposit juga bersifat lentur sehingga dapat dikategorikan sebagai flex battery karena voltase stabil seiring dengan bertambahnya nilai curvature.
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Electric Vehicles are still in the development stage, especially in the battery component. The addition of a battery is directly proportional to the increase in battery mass for the same battery making material, as in the Tesla model S with a battery capacity of 85 kWh which weighs 25% of the total weight of the vehicle. In order for electric vehicles to be more efficient, it is necessary to reduce vehicle weight, especially in the battery section that can be replaced with structural composite batteries which aim to provide massless energy storage in electrically powered structural systems, using lightweight materials that can simultaneously transport lithium ions and store electrical energy. while being able to transfer high mechanical loads. The experimental method used is a composite battery synthesis method in the form of a pouch cell. The composite consists of several materials, namely Aluminum NMC532 as the cathode, copper-coated graphite as the anode, and glass fiber as the separator. The matrix as well as the electrolyte in this composite is a solid polymer electrolyte (SPE) with a mixture of LiFP6 and EC salts along with DMC mixed with resin and hardener. The separators used in this research are Whatman, glass fiber WR50, and glass fiber WR200. There are differences in geometry, type of structure, and density. To determine the mechanical performance of each thickness variation and type of separator, tensile and flexural tests were carried out. Optical microscopy was then carried out to study the battery geometry and failure patterns. The results showed that the battery with the WR200 separator had the highest strength and stiffness of 15.63 MPa and 190.96 MPa, respectively. The data is reinforced by the results of the tensile test to determine the strength of the separator, which shows that WR200 has the highest strength value of 1495.62 MPa. There is an effect of the charge-discharge cycle on the mechanical performance of the battery. There is a decrease in mechanical performance caused by the degradation of the battery's active material. Battery failure after tensile test was dominated by delamination, debonding, and adherend failure. The effect of curvature on electrochemical performance is reviewed through a flexural test, a battery that is still self-discharged can increase its voltage again when given a bending force. The result of this research is that glass fiber woven roving is very suitable to be used as a separator in composite structural composites because it has a thin thickness and high strength. This composite battery, besides being able to store and transmit power, also has good mechanical strength. In addition, composite batteries are also flexible so they can be categorized as flexible batteries because the voltage is stable as the curvature value increase

Item Type:	Thesis (Other)
Additional Information:	RSM 621.312 42 Sat s-1 2022
Uncontrolled Keywords:	Baterai Struktural Komposit, Separator, Performa Mekanik, Tensile test, Flexural Test, Structural Composite Battery, Separator, Mechanical Performance, Tensile test, Flexural Test
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL220.5 Battery charging stations (Electric vehicles)
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	25 Feb 2025 07:33
Last Modified:	25 Feb 2025 07:33
URI:	http://repository.its.ac.id/id/eprint/118888

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