The effects of Ni on inhibiting the separation of Cu during the lithiation of Cu6Sn5 lithium-ion battery anodes

Cobalt‐doped Cu6Sn5 lithium‐ion battery anodes with enhanced electrochemical properties

“…Ni-doping was found to result in similar additional reflections in (Cu,Ni) 6 Sn 5 . [15] In summary, Figure 5 shows (1) at the Co concentrations investigated, all electrodes have the η' crystal structure, and (2) at higher concentrations of Co, the crystal structure of the (Cu,Co) 6 Sn 5 is slightly altered and this may have an impact on the Li diffusion path in the material.…”

“…[ 16 ] By reacting a molten Sn‐Cu alloy with solid Cu substrates, the process of solidification and solid‐liquid diffusion leads to the formation of a Cu 6 Sn 5 crystal layer which is bonded intimately with the Cu current collector. [ 7,15 ] The 10 th cycle capacity of the resultant electrode was 470 mAh g –1 , which is merely about 50% of the theoretical capacity of Sn. Thus the method requires further development.…”

“…Extensive studies have shown a reduced likelihood of Li metal plating in Sn-based anodes, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] making Sn-based anode materials one of the most promising candidates to replace carbon-based anodes. Sn has a higher averaged reaction potential of 0.43 V versus Li/Li + compared to carbon which reacts between 0 and 0.2 V versus Li/Li + , [15] resulting in a lower risk for Li metal plating in Sn-based anodes.…”

“…Extensive studies have shown a reduced likelihood of Li metal plating in Sn-based anodes, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] making Sn-based anode materials one of the most promising candidates to replace carbon-based anodes. Sn has a higher averaged reaction potential of 0.43 V versus Li/Li + compared to carbon which reacts between 0 and 0.2 V versus Li/Li + , [15] resulting in a lower risk for Li metal plating in Sn-based anodes. Sn also has a theoretical specific volumetric capacity of 2200 mAh cm -3 and a theoretical gravimetric capacity of 994 mAh g -1 , which is more than twice that of the carbon-based anode materials, and a reversible Li-ion storage capacity above 600 mAh g -1 .…”

Dealloying-Derived Nanoporous Cu6Sn5 Alloy as Stable Anode Materials for Lithium-Ion Batteries

“…In addition to the above-mentioned materials, the most studied Sn-based materials are Cu-Sn alloys, as copper owns high conductivity and elasticity, and Cu 6 Sn 5 possesses the high theoretical capacity of 605 mA h g −1 [ 20 , 21 , 22 , 23 , 24 , 25 ]. Several approaches have been applied to fabricate Cu 6 Sn 5 nanoparticles, film, or nanowires [ 20 , 26 , 27 , 28 , 29 ]. A solution route was used to synthesize dendrite Cu 6 Sn 5 powers [ 27 ].…”