VINIF.2020.NCUD.DA039 – Application of process for synthesizing electrode materials from rice husks to experimentally produce 4 V button-shaped Li-ion batteries (coin cells) and bag-shaped Li-ion batteries (pocket cells)

Principle Investigator
Assoc.Prof. Le My Loan Phung
Host Organization
VNUHCM - University of Science

Silica material is synthesized from rice husks (from Tan Tru district, Long An province, Vietnam) according to the process of inert gas calcination and surface activation of the material with KOH. This is a simple, low-cost synthesis process because the entire amount of finished rice husk ash is researched and used as the cathode for Li-ion rechargeable batteries. Based on current research results, silica materials have the potential to completely replace commercial Graphite materials in terms of price and efficiency. Therefore, the application of trial production of rechargeable Li-ion batteries using silica anode materials synthesized from rice husks is very feasible to create Li-ion button batteries used in electronics components (watches, personal computers, etc…) or pocket-sized rechargeable Li-ion batteries (phones, compact electrical devices).

Expected output:

  • 03 International scientific articles in prestigious journals under the SCI or SCIE categories, 03 domestic scientific articles.
  • Report on the process of producing silica materials from rice husks used as electrodes for Li-ion rechargeable batteries.

Commercial Li-ion button battery products and Li-ion pocket batteries are tested according to industrial battery standards and are suitable for applications in mobile electronic devices.

Associate Professor, Dr. Le My Loan Phung (PI) has 6 years of study and research in the field of rechargeable batteries (PI completed master’s, doctoral and post-doctoral programs in France), 9 years of working on projects mainly related to the field of electrochemical batteries such as: Research on positive electrode materials for chemical power sources (primary batteries, rechargeable Li-ion batteries), research on electrolytes (solvents, ionic liquids) for chemical power source, research on polymer membranes as diaphragms in rechargeable batteries, fuel cells, fuel cells using hydrogen (PEMFC) or solid oxide (SOFC). In addition, PI was invited to participate in short-term research (3 times) at the Research Institute of Materials Chemistry and Engineering – Kyushu University, Japan on the project of electrolytes for batteries, research in the 500 kWh battery project (Consortium Batt500) and project to develop advanced materials for batteries (Consortium Battery Material Research) at Pacific Northwest National Laboratory (USA). PI has participated and led the implementation of 09 research projects, published 41 international articles and 40 domestic articles and participated in many domestic conferences and seminars. PI is honored to receive a certificate of merit from the Prime Minister for her achievements in work, contributing to the cause of building socialism and protecting the Fatherland in 2019 and many individual awards for achievements in Excellent publishing in all of Vietnam National University-HCM for many years, receiving many valuable awards and scholarships from many reputable organizations.

Principle Investigator
Assoc.Prof. Le My Loan Phung
Host Organization
VNUHCM - University of Science

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Expect Progress
12/05/2020
12/11/2020
Phase 1

+ Synthesized 1000 grams of silica/C material;

+ Report on the process of producing silica materials from rice husks used as electrodes for Li-ion batteries;

+ Table of results of evaluating the morphology and structure of materials, including results: SEM, TEM, XRD, Raman, EDX, AAS;

+ Submit a patent registration for the process of synthesizing negative electrode materials;

+ Published 01 domestic article.

12/05/2021
Phase 2

+ Block diagram describing the film creation process and electrode film quality;

+ Results of surveying the electrochemical properties of materials: Scanning the cyclic potential, fixed-current charging, variable-flow charging, calculating ion diffusion coefficient;

+ Electrochemical impedance spectrum results determine the battery’s resistance;

+ Completely assemble 25 button batteries;

+ Complete button battery assembly process;

+ Published 01 domestic article, 01 international article;

+ 01 patent application accepted (filed in Phase I).

12/11/2021
Phase 3

+ Completely assemble 25 button batteries;

+ Results of surveying battery features: voltage, capacity, energy, capacity, resistance, charge capacity, discharge efficiency, number of discharge cycles achieved of complete batteries in different locations. different launch and charging modes;

+ Predict the mechanism of SEI layer formation on the surface of silica/C electrode;

+ Published 01 domestic article, 02 international articles.

12/05/2022
Phase 4

+ Pocket battery assembly process;

+ Assemble 50 complete pocket batteries;

+ Results of surveying battery features: voltage, capacity, energy, capacity, resistance, charge capacity, discharge efficiency, number of discharge cycles achieved of complete batteries in different locations. different launch and charging modes;

+ Published 02 international articles.

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