Novel coordination polymer-based cathodes for high energy rechargeable divalent batteries
The main goal of this project is to explore a new type of organic cathode material for rechargeable divalent (Mg and Ca) batteries, as a post Li-ion battery (LIB) technology. The originality of this project is to synthesize anionic coordination polymer (CPs) in discharged state (containing Mg- or Ca- cation) like a typical LIB inorganic cathode without the need for a metal anode.
The researcher here aims to not only solve the long-standing issue of complete rechargeability of divalent batteries, but also to construct the first Mg/Ca anode free cells.
Specifically, the main objectives of this project are:
- Preparation of a new class of high voltage organometallic cathodes for Mg and Ca-based batteries.
- Establishing the structure-performance correlation and reaction pathway of rechargeable divalent batteries via operando electrochemical and cutting edge Synchrotron based characterization tools.
- Constructing Mg and Ca-based CiPBAT prototype pouch cells that can operate at high voltage (~2-3 V for Mg and ~3-4 V for Ca) with good cycling stability of at least 250 cycles.
The scientific findings generated during the implementation of this project are expected to boost the sustainable all-organic divalent battery research to a new level and replace the need of scarce, expensive and controversial supply of raw materials in current systems, that will significantly reduce the cost per energy density.