Toward high-performance rechargeable magnesium batteries with a Cu 2 Se-CTAB nanoparticle cathode and Mg[B(HFIP) 4 ] 2 /DME electrolyte

Cu 2 Se-CTAB samples with different added amounts of CTAB, namely Cu 2 Se-100CTAB nanoparticles, achieve a reversible capacity of 296.8 mA h g −1 after 60 cycles at 0.1 A g −1 and maintain 134 mA h g −1 after 300 cycles.