Engineering of Multifunctional Materials of Next Generation Lithium Batteries

Title of the project: Engineering of Multifunctional Materials of Next Generation Lithium Batteries

IRN AP 09259764

 

Relevance

Lithium-ion batteries (LIBs) have opened up new opportunities for the rapid development of modern portable devices. In LIB, intercalation cathodes are mainly used as cathodes, represented by oxides and phosphates of transition metals, which are unable to meet the requirements of electric vehicles and high energy storage systems due to their limited energy density (less than 400 Wh/kg). Moreover, intercalation-type cathodes have several disadvantages associated with high material costs and safety issues, which also limit their use in electric vehicles and large-scale power systems. Therefore, the introduction of alternative systems with higher power density, energy density and lower cost sources is required to meet the high requirements. In this respect, lithium-sulfur (Li-S) batteries are considered one of the most promising energy systems due to their high theoretical specific capacity, which leads to a theoretical energy density of 2600 Wh/kg. Moreover, sulfur is of low cost, to a large extent. lower environmental impact and abundant resources. However, the introduction of Li-S batteries is difficult due to a number of disadvantages, such as low conductivity of sulfur, complex redox reactions, transfer of soluble intermediate products (lithium polysulfides, LiPS), growth of dendrites on the lithium anode, and volumetric expansion of the cathode upon reduction to Li2S2/Li2S, which leads to structural degradation and reduced battery life.

Goal

The goal of this project is to develop and obtain highly efficient materials for new generation lithium-sulfur batteries using nanotechnological approaches and efficient design. During the implementation of the project, new carbon sulfur host materials for lithium-sulfur batteries will be developed, their electrochemical and physical characteristics and operation in lithium-sulfur batteries will be studied.

Expected and achieved results

As a result of the work carried out, all items of the schedule for 2021 were completed. The results of the project were presented at the international virtual conference EMRS (the European Materials Research Society) 2021 Fall Meeting. Also, as a result of work for 2021, two articles were published in the leading international scientific journal "Journal of Alloys and Compounds" (impact factor IF (2019) = 4.65; Q1). The scientific novelty of the work on the project lies in the development of new high-performance materials with desired properties for energy storage and conversion systems, and new methods for characterizing materials. A strategy for the development of carbon sulfur host matrices functionalized with metal compounds is demonstrated. The developed materials have been shown to successfully improve the electrochemical properties of lithium-sulfur batteries. Lithium-sulfur batteries with an initial discharge capacity of more than 1100 mAh g-1 were made on the basis of carbon sulfur host matrix functionalized with metal compounds.

First and last names of members of the research group

Prof. Zhumabay Bakenov (https://research.nu.edu.kz/en/persons/zhumabay-bakenov) (https://orcid.org/0000-0003-2781-4955) (https://scholar.google.ca/citations?user=wlF8ZUoAAAAJ&hl=en)

Dr. Аishuak Konarov (https://research.nu.edu.kz/en/persons/aishuak-konarov) (https://orcid.org/0000-0001-9352-8602) (https://scholar.google.co.kr/citations?user=zl0fOTMAAAAJ&hl=en)

Dr. Аlmagul Ментбаева (https://research.nu.edu.kz/en/persons/almagul-mentbayeva) (https://scholar.google.com/citations?user=l1whEYsAAAAJ&hl=en)

Prof. Yanwei Wang (https://research.nu.edu.kz/en/persons/yanwei-wang) (https://orcid.org/0000-0002-8488-9833) (https://scholar.google.com.hk/citations?user=PAAv_KMAAAAJ&hl=zh-CN)

Prof. Yongguang Zhang (https://www.scopus.com/authid/detail.uri?authorId=55020162200)

Yan Zhao (https://www.scopus.com/authid/detail.uri?authorId=56183389000)

Nurzhan Baikalov (https://www.scopus.com/authid/detail.uri?authorId=57216365173)

Islam Rakhimbek