Critical mineral dependence is a strategic vulnerability for India's energy transition. Examine how indigenous battery chemistries can mitigate this risk.

Q. Critical mineral dependence is a strategic vulnerability for India's energy transition. (15 marks, 250-350 words)

India's shift to non-fossil energy rests on storage, and storage today rests on lithium, cobalt and nickel — minerals India barely produces. This import dependence converts a climate goal into a strategic exposure, which indigenous chemistries such as aqueous zinc-ion batteries (AZIBs) can substantially, though not wholly, offset.

Nature of the vulnerability - Supply concentration: Li, Co and Ni value chains are dominated by a few states — China, the DRC, Australia and Chile — leaving India price- and policy-taking [2]. - Cost exposure: Li-ion needs flammable organic electrolytes and dry-room manufacturing, raising both CAPEX and safety risk for stationary grid storage [1]. - Strategic leverage: mineral chokepoints can be weaponised through export curbs, directly hitting the renewable and e-mobility push.

How indigenous chemistries mitigate the risk - Zinc as substitute: zinc is abundant, cheap, non-toxic and water-compatible, and aqueous electrolytes are non-flammable — cutting import dependence and storage cost simultaneously [2]. - Frugal R&D lever: DST's INST has developed the electrolyte additive BDIM, which regulates the zinc–electrolyte interface to suppress dendrites, hydrogen evolution and corrosion — solving AZIB failure modes through interface engineering rather than costly material redesign, making it scalable [1]. - Performance credibility: CeNS, Bengaluru unlocked a sulfur-vacancy 1T-MoS₂ cathode retaining 97.91% capacity after 500 cycles at 99.7% Coulombic efficiency — grid-relevant durability [2]. - Institutional route: the DST autonomous-institute model (INST, CeNS) shows a working pipeline from frontier materials science to deployable clean-energy technology [2].

Limits to be acknowledged Zinc chemistries suit stationary grid storage, not high energy-density mobility; commercialisation still awaits pilot-scale validation and manufacturing ecosystems.

Indigenous chemistries therefore act as a risk-diversifier, not a substitute for mineral security. Pairing them with the National Critical Mineral Mission, ACC-battery manufacturing incentives and battery recycling would convert laboratory success into genuine strategic autonomy — advancing both Atmanirbhar Bharat and India's net-zero 2070 commitment.

(~330 words)

Sources: 1. Advancing electrolyte engineering for durable and affordable aqueous batteries — PIB, Ministry of Science & Technology (18 June 2026) — AZIB failure modes (dendrites, HER, corrosion), INST's BDIM electrolyte additive, interface engineering as a scalable low-cost strategy, Li-ion's flammable organic electrolytes 2. Scientists unlock new cathode material enabling Zinc-Ion Batteries for grid storage — Department of Science & Technology — zinc's abundance, low cost and safety; CeNS Bengaluru's 1T-MoS₂ cathode with 97.91% retention over 500 cycles and 99.7% Coulombic efficiency; DST autonomous-institute model