PNNL, GM team develops design principle for stable silicon anodes for Li-ion batteries
PNNL, GM team develops design principle for stable silicon anodes for Li-ion batteries 28 April 2017 A team from Pacific Northwest National Laboratory (PNNL), with colleagues from General Motors R&D, has developed a design principle for stable high-capacity Li-ion battery silicon (Si) anodes of controlled thickness swelling, and synthesized a porous Si/C-graphite electrode as an example. Experimental data from the porous Si/C-graphite electrode showed excellent agreement with the theoretical design. The practical electrode (~3 mAh/cm2 loading) with ~650 mAh/g specific capacity had ~82% capacity retention over 450 cycles. The initial electrode swelling upon full lithiation is ⅓Mn⅓ Co⅓ )O2 and the pre-lithiated anode demonstrated >84% capacity retention over 300 cycles. A paper on the work is published in the RSC journal Energy & Environmental Science . As has been noted man...