The most common ways of improving Li+ and electron conductivity in LFP are to reduce particle size or to employ conductive material coating . Carbon-based coatings are majorly used as they increase electrical conductivity to a large extent. However, if the coating becomes too thick, it leads to a reduction in gravimetric capacity. Another approach is to synthesize LFP particles in the sub-micron or nanometre range and then use it to prepare composites . LFP core-shell composites have also been explored , . This leads to improvement in lithium-ion conductivity but does not lead to improvement in electrical conductivity. Various doping elements have been studied for increasing the electrical and ionic conductivity of LFP . LFP/C composites with a core-shell structure have been observed to improve electrode performance , . Carbon-free LFP materials with narrow size distribution are also being researched as they shorten diffusion lengths. Doping of LFP with C and Zn 4+ shows increased electron transport , .