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2. Aqueous battery - Wikipedia

   en.wikipedia.org/wiki/Aqueous_battery

   An aqueous battery is an electric battery that uses a water-based solution as an electrolyte.The aqueous batteries are known since 1860s, do not have the energy density and cycle life required by the grid storage and electric vehicles, [1] but are considered safe, reliable and inexpensive in comparison with the lithium-ion ones. [2]

3. Molten-salt battery - Wikipedia

   en.wikipedia.org/wiki/Molten-salt_battery

   Molten-salt batteries are a class of battery that uses molten salts as an electrolyte and offers both a high energy density and a high power density. Traditional non-rechargeable thermal batteries can be stored in their solid state at room temperature for long periods of time before being activated by heating.

4. Electrolyte - Wikipedia

   en.wikipedia.org/wiki/Electrolyte

   In batteries, two materials with different electron affinities are used as electrodes; electrons flow from one electrode to the other outside of the battery, while inside the battery the circuit is closed by the electrolyte's ions. Here, the electrode reactions convert chemical energy to electrical energy.

5. Anode-free battery - Wikipedia

   en.wikipedia.org/wiki/Anode-free_battery

   Anode-free lithium ion batteries have been demonstrated using a variety of cathode materials, such as LiFePO 4, LiCoO 2, and LiNi 1/3 Mn 1/3 Co 1/3 (NMC 111).. These intercalation-type cathodes typically offer limited Li content (14.3 at.% for LiFePO4, 25 at.% for LiCoO2 and LiNixCoyMn1-x-yO2), although they remain the primary research targets. [2]

6. Aqueous lithium-ion battery - Wikipedia

   en.wikipedia.org/wiki/Aqueous_lithium-ion_battery

   Aqueous Li-ion batteries have been of great interest for military use due to their safety and durability. Unlike the high voltage yet volatile non-aqueous Li-ion batteries, aqueous Li-ion batteries have the potential to serve as a more reliable energy source on the battlefield, because external damage to the battery would not diminish performance or cause it to explode.

7. Sodium–sulfur battery - Wikipedia

   en.wikipedia.org/wiki/Sodium–sulfur_battery

   Cut-away schematic diagram of a sodium–sulfur battery. A sodium–sulfur (NaS) battery is a type of molten-salt battery that uses liquid sodium and liquid sulfur electrodes. [1] [2] This type of battery has a similar energy density to lithium-ion batteries, [3] and is fabricated from inexpensive and low-toxicity materials.