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Anode materials

#K-2321


Development of high capacity novel lithium titanate and silicon based anode materials for state of the art lithium-ion batteries.

Tech Area / Field

  • MAN-MAT/Engineering Materials/Manufacturing Technology
  • MAT-COM/Composites/Materials
  • MAT-SYN/Materials Synthesis and Processing/Materials
  • NNE-BCM/Batteries and Components/Non-Nuclear Energy

Status
3 Approved without Funding

Registration date
17.08.2016

Leading Institute
Institute of batteries, Kazakstan, Astana

Collaborators

  • Sejong University, Korea, Seoul

Project summary

The Project aim. Development of a new technology for the preparation of a [LTO/Si]@C composite anode material based on Li4Ti5O12 spinel lithium titanate (LTO) and silicon (Si) with carbon coating by the use of spray pyrolysis, where the composite is expected to possess the synergistic effect between components by showing improved battery performance.

Current status. Preliminary investigation of physical and electrochemical properties of [LTO/Si]@C composite prepared by solid-state synthesis is performed. Also, the test synthesis of this composite by spray pyrolysis was carried out. Gathered results enable to conclude that combining the LTO and silicon indeed greatly improves the properties of the composite in comparison with the properties of inpidual components by balancing their advantages and disadvantages. Therefore, the proposed composite is a promising anode material for new generation LIBs.

The structure, morphology and homogeneity of the composite are the key factors for improving the properties of lithium-ion batteries, and the way a composite is synthesized determines these properties. The method of synthesizing nanomaterials by using spray pyrolysis is unique, so it allows the synthesis of powder materials with significantly improved properties for practical use. Also, it is a key technology to achieve controlled synthesis of microparticles with a homogeneous structure and morphology required to produce electrode materials with high performance.

The project’s influence on progress in this area. The development of safe, affordable and environmentally friendly electrode materials with excellent electrochemical characteristics for LIBs is a determining factor in the advancement of renewable energy technologies, portable electronic devices and electric vehicles and their large-scale proliferation. In this project, we offer innovative and practical concepts for the new composition of the [LTO/Si]@C composite. The ultimate aim is the use of the [LTO/Si]@C composite as an anode for the new generation "super-capacity" lithium-ion batteries. Preliminary tests have confirmed that the proposed composite material [LTO/Si]@C, obtained by spray pyrolysis, has a substantially higher capacity energy storage and improved mechanical stability, and has a higher electrochemical capacity and low cost compared with existing commercial anode materials. The proposed method involves the use of spray pyrolysis as a practical method capable of creating a composite with superior structural and morphological properties. Also, spray pyrolysis is a fairly simple method for scaling up to industrial production. Successful implementation of this project involves a significant impact the quality of life, both economical and social. This is because this project focuses on areas such as the renewable energy storage systems, environmentally friendly transport, communication tools, security, etc., which are key technologies in the sustainable development of modern society.


Expected results and their application. The project will result in the development of novel high energy density [LTO/Si]@C composite anode materials for LIBs prepared by an efficient spray pyrolysis technique. This high energy density battery will be tested for its electrochemical performance and the results will be patented and published in international journals with high impact factor. The positive outcome of this project will quickly lead to the next step of the Project - commercialization of high energy density and stable materials for LIBs. We believe that any technological advance accomplished in the framework of the current research will contribute, directly or indirectly, to the local economy and technological development, and result in increased number of job vacancies. As mentioned, the progress in the development of high-energy batteries with long life cycle, safety and high power performance will encourage the maintenance and persification of the energy sector in Kazakhstan, providing its sustainability and resulting in a significant economic as well as industrial growth in the future. Therefore, development and use of the technologies aimed in this Proposal will have a strong economic, social and ecological effect on Kazakhstan and the Central Asia.

Meeting the ISTC goals and objectives. The following project employs professionals, who had contributed to the development of nuclear weapons of mass destruction in the past, and the aim of the project is to facilitate the development of energy derived from environmentally friendly renewable sources aimed at improving living standards. Therefore, submitted project fully complies with the ISTC goals and objectives. Accumulated results during the project operation will be presented to the international scientific community in international conferences and seminars.


Scope of activities. The following activities will be implemented under the Project:

    - designing, assembling and optimization of spray pyrolysis facility;
    - optimization of the synthesis method, and the synthesis of [LTO/Si]@C composite by varying the precursor composition and synthesis conditions (temperature, flow rate, concentration, etc.);
    - characterization of the structure and morphology of the obtained composites by using various characterization techniques (SEM,TEM);

    - development and preparation of the anode on the basis of the obtained composite material, half-cell assembly, testing the electrochemical properties of assembled cells using a variety of testing methods, the analysis and interpretation of results;


    - development of a full-size prototype of the cell, cathode material selection and testing of the electrochemical properties of the collected cells using a variety of testing methods, the analysis and interpretation of results;
    - international and national patenting of the invention;
    - presentation of the achieved results on the international conferences receiving discussions and feedback;
    - preparation of publications and reports.


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