Sodium secondary batteries have a similar working principle to lithium secondary batteries but are low-cost and are expected to serve as a powerful supplement to lithium secondary batteries. Solid-state batteries offer high-safety and high-energy-density features, and are considered to have remarkable prospects. However, all-solid-state batteries are disadvantaged by their poor physical solid-solid interfacial contact and low ionic conductivity, which restrict their performance and hinder their short-term commercial applicability.
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Source: Phys.org