Direct conversion of the tremendous and ubiquitous low-grade thermal energy into electricity by thermogalvanic cells is a promising strategy for energy harvesting. The environment is one of the richest and renewable low-grade thermal source. However. critical challenges remain for all-day electricity generation from environmental thermal energy due to the low frequency and small ampli... https://www.parisnaturalfoodes.shop/product-category/org-maca-pwd/