Manoj Jangid

PhD scholar

Department of metallurgical engineering and materials science

Indian Institute of Technology Bombay (IIT Bombay), Mumbai (India)

email: manojcct@gmail.com

Currently, Manoj Jangid is a research associate (PhD thesis submitted) in the department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay (IIT Bombay), India. He is going to be graduated by the end of April 2019 (tentatively). His current research focuses on energy storage applications majorly Li-ion/Na-ion/K-ion batteries. The PhD work highlights the importance of just the presence of the thin 'buffer interlayer' (i.e., graphene and NiTi shape memory alloy) between the current and active film (in this case Si thin film). Such thin 'buffer interlayer' act as 'spacer' or absorber layer which reduces the detrimental volume changes related colossal stresses developed in the high energy density alloy reaction based anodes, which ultimately results in improved electrochemical stability of alloy based anodes materials.

To understand the stress developments and associated structural changes, real time stress monitoring has been conducted for both anodes (viz., Si, Sn, Al, graphite and graphene etc. fro Li-ion batteries, Na2Ti3O7 for Na-ion batteries and Sn, graphene and graphite for K-ion batteries) and cathodes (i.e., LiCoO2) using multi-beam optical stress sensor (MOSS; which measures the stress monitoring the change in substrate curvature). Additionally, the effect of the SEI layer formation on the overall stress development has also been investigated. The adhesion properties of the active material films in the presence/absence of the 'buffer interlayers' have also been investigated. The in-situ XRD studies (using the synchrotron beam) have revealed that the lithiation/delithiation induced stress are sufficient to reversibly deform NiTi (underneath the Si film) with thickness even below 200 nm in order to mitigate the stresses in Si thin film anodes. The in-situ XRD has revealed the charge storage mechanism in Sn (K-storage) and Na2Ti3O7 (Na-storage).

Manoj has the hands-on operation of various techniques including the FEG-SEM, dual-bean FIB-SEM (for ~ 3.5 years) and Raman spectroscopy. He has developed the skills to make TEM lamella using the FIB milling and cross-section SEM imaging. He gained the expertise in material synthesis (by wet-chemical synthesis), thin film deposition (by sputter, e-beam evaporation, pulsed laser deposition, chemical vapor deposition etc.), various electrochemical characterization techniques including cyclic voltmetery (CV), charge/discharge cycling, GITT, EIS etc. He is expert in the growth of graphene (with controlled layer number, defects etc) and graphite on Cu/Ni substrates by chemical vapor deposition (CVD) technique.

In addition, Manoj is active reviewer for ACS Applied Materials and Interfaces, Carbon and International Journal of Recent Research Aspects (IJRRA). He has mentored 5 masters degree students during their master thesis.