- do ctor al ▁work ▁on ▁Lith ium - ion ▁battery ▁at ▁Ky oto ▁University ▁as ▁a ▁J SP S ▁fellow ▁between ▁ 1 9 9 8 ▁and ▁ 2 0 0 0 ▁and ▁at ▁A ichi ▁Institute ▁of ▁Technology ▁from ▁ 2 0 0 0 ▁to ▁ 2 0 0 3 . ▁The ▁same ▁year , ▁he ▁moved ▁to ▁Germany ▁as ▁an ▁Alexander ▁von ▁H umb old t ▁Fellow ▁at ▁Techn ische ▁Universität ▁Il men au ▁to ▁work ▁on ▁carbon ▁nan ot ube ▁and ▁graph ene ▁where ▁he ▁stayed ▁till ▁ 2 0 0 4 . ▁His ▁next ▁assignment ▁was ▁at ▁Ky ush u ▁University ▁as ▁a ▁visit ing ▁associate ▁professor ▁and ▁he ▁returned ▁to ▁India ▁to ▁take ▁up ▁the ▁position ▁of ▁the ▁deput y ▁general ▁manager ▁at ▁H indust an ▁Elect ro ▁Graph ite , ▁Bh op al ▁on ▁the ▁New ▁Year ' s ▁Day ▁of ▁ 2 0 0 8 . ▁His ▁st int ▁at ▁Bh op al ▁last ed ▁only ▁a ▁week ▁and ▁he ▁went ▁back ▁to ▁Ky ush u ▁University ▁to ▁res ume ▁his ▁duties ▁as ▁a ▁visit ing ▁fac ulty , ▁a ▁post ▁he ▁held ▁for ▁two ▁months . ▁In ▁June ▁ 2 0 0 8 , ▁he ▁joined ▁his ▁old ▁institution , ▁National ▁Phys ical ▁Labor atory . ▁Following ▁differences ▁with ▁the ▁inst itute ▁administration , ▁he ▁res igned ▁from ▁National ▁Phys ical ▁Labor atory ▁in ▁June ▁ 2 0 1 8 ▁to ▁take ▁up ▁a ▁position ▁of ▁Research ▁Associ ate ▁at ▁K hal ifa ▁University