Alternatives ‘Beyond-Lithium’ Batteries Emerge amid Rising Sectoral Demands | Current Affairs | Vision IAS

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In Summary

  • Sodium-ion batteries use abundant, inexpensive sodium ions, offering safer operation and easier transport/storage than lithium-ion batteries.
  • Fluoride-ion batteries provide high energy densities (over 2000Wh/kg) and utilize abundant fluorine, unlike lithium-ion batteries.
  • Lithium-ion batteries offer higher energy densities than lead-acid and sodium-ion, but face supply chain issues and slow charging rates.

In Summary

Battery alternatives like Sodium and Fluoride ion batteries offer huge potential apart from lithium ion batteries. 

About Sodium-Ion Batteries

  • Meaning: Function similarly to lithium-ion batteries but use sodium- ions (Na+) as charge carriers.
    • Rechargeable battery that generates electricity by moving ions between two electrodes: a positive electrode (cathode) and a negative electrode (anode). 
  • Benefits Offered:
    • Availability: Sodium being abundant, inexpensive, and globally available.
    • Safer: Lower risk of catching fire compared to Lithium batteries when operated in extreme conditions.
    • Transportation and storage:  Typically safer compared to lithium. 

About Fluoride-Ion Batteries

  • Meaning: Rechargeable system in which fluoride ions (anions) serve as mobile charge carriers between electrodes during cycling.
  • Benefits Offered:
    • High Energy Densities: Could deliver more than 2000Wh/kg (compared 500 Wh/kg for Lithium ion batteries). 
    • Availability: Fluorine is far more abundant than lithium with a larger supply chain. 

Lithium-Ion Batteries

  • About: Rechargeable battery, widely used in portable electronics and electrified transportation.
    • Anode and cathode store lithium, electrolyte carries positively charged lithium ions from anode to cathode and vice versa through separator. 
  • Benefits: Higher energy densities compared to lead-acid batteries (75 Wh/kg) and sodium ion batteries (100-160 Wh/kg); low maintenance; low self-discharge rate (1.5-2% per month); does not contain toxic lead or cadmium. 
  • Constraints: High import dependence and supply chain disruptions issues(depends on scarce lithium, graphite, cobalt, nickel), slow charging rate, etc. 
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RELATED TERMS

3

Electrolyte

A substance containing free ions that conducts electricity. In batteries, electrolytes facilitate the movement of ions between the positive and negative electrodes, enabling the electrochemical reactions that store and release energy.

Cathode

In a battery, the cathode is the positive electrode. During discharge, it receives electrons from the external circuit and ions from the electrolyte. Common cathode materials include nickel, cobalt, manganese, and aluminum.

Anode

In a battery, the anode is the negative electrode. During discharge, it releases electrons to the external circuit and ions to the electrolyte. Common anode materials include graphite, zinc, silicon, and lithium.

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