Journal Article magnesium batteries anode failure borates chemisorption effect current homogenization diffusion limited theory diffusion-control buffer zone geometric confinement high areal capacity in situ crosslinking reaction lithium tetrakis(hexafluoroisopropyloxy)borate magnesium anodes magnesium metal anode magnesium metal anodes nucleation theory polymer electrolytes polytetrahydrofuran rechargeable magnesium batteries solid electrolyte interphase uneven stripping uniform plating uniform plating behavior volcano plot