This design could serve as the foundational concept for the upcoming ultrahigh-energy-density lithium batteries. An extreme design of lithium batteries replies a significantly high mass percentage of the cathode material. The higher energy density of cathode materials will result in a higher energy density of the cell [24, 33].
Noticeably, there are two critical trends that can be drawn toward the design of high-energy-density lithium batteries. First, lithium-rich layered oxides (LLOs) will play a central role as cathode materials in boosting the energy density of lithium batteries.
In order to achieve the design principle of 500 Wh/kg-class lithium batteries, it is promising to use 4.8 V-LLOs together with the relatively safe Si@C anode materials. 4.8 V-LLOs/Si@C design principle can effectively avoid the problems of ultrahigh-capacity anode, such as the expansion of Si and the dendrite growth of Li metal anode.
For high-energy density lithium batteries, there are still many issues to be considered, including the mechanical property. It is considered that the development of high-energy-density lithium batteries can hardly be separated from the development of SSEBs.
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