# The Progress of Cobalt-Based Anode Materials for Lithium Ion Batteries and Sodium Ion Batteries
## 3 Preparation Methods of Synthesizing Cobalt-based Active Materials
### Other Methods
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Types of Materials** & **Synthetic Method** & **Co Source** & **Reference** \\ \hline Co\({}_{3}\)Sn\({}_{2}\)@Co-NG & Hydrothermal (250 \({}^{\circ}\)C, 24 h) & CoCl\({}_{2}\)*6H\({}_{2}\)O & [53] \\ \hline Special CoSn\({}_{2}\)/Sn alloy & Heat treatment (800 \({}^{\circ}\)C, Ar) & Co\({}_{3}\)O\({}_{4}\) & [22] \\ \hline Sn-Co-C ternary alloy & HEMM & Co powder & [34] \\ \hline Sn\({}_{96}\)Co\({}_{41}\)C\({}_{23}\) alloy & Magnetron sputtering & Co powder & [19] \\ \hline Sn\({}_{40}\)Co\({}_{40}\)C\({}_{20}\) & HEMM & Co powder & [45] \\ \hline Sn-Co-C composite & HEMM & Co(C\({}_{5}\)H\({}_{7}\)O\({}_{2}\))\({}_{3}\) & [42] \\ \hline Sn-Co alloy & Electrodepositing & CoCl\({}_{2}\)*6H\({}_{2}\)O & [43] \\ \hline Sn-Co/CNTs & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [102] \\ \hline Sn-Co-C composite & HEMM & CoO & [83] \\ \hline Nano-sized Co-Sn alloy & Hydrothermal (160 \({}^{\circ}\)C,48 h) & CoCl\({}_{2}\)*6H\({}_{2}\)O & [55] \\ \hline Sn\({}_{90}\)Co\({}_{90}\)C\({}_{40}\) alloy & Ball-milling & Co powder & [81] \\ \hline CoSn\({}_{3}\) & Hydrothermal (195 \({}^{\circ}\)C, 1.5 h) & CoCl\({}_{2}\)*6H\({}_{2}\)O & [56] \\ \hline Sn-Co alloy & Electrodepositing & CoCl\({}_{2}\)*6H\({}_{2}\)O & [38] \\ \hline CoSn\({}_{2}\) & Electrodepositing & Co electrode & [89] \\ \hline Nanostructure Sn-Co-C composites & Galvanic replacement & Co(CH\({}_{3}\)COO)\({}_{2}\)*4H\({}_{2}\)O & [103] \\ \hline porous Sn-Co alloy & Electrodepositing & CoCl\({}_{2}\)*6H\({}_{2}\)O & [86] \\ \hline CoSn\({}_{3}\)-MWCNTs & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [104] \\ \hline Sn\({}_{54}\)Sb\({}_{41}\)Co\({}_{5}\) alloy & Electrodepositing & CoCl\({}_{2}\)*6H\({}_{2}\)O & [85] \\ \hline CoSn\({}_{5}\) nanospheres & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [105] \\ \hline Graphene wrapped-SnCo & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [106] \\ nanoparticles & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [106] \\ \hline CoSn\({}_{2}\) alloy & Electrodepositing & CoCl\({}_{2}\)*6H\({}_{2}\)O & [84] \\ \hline Sn-Co-CNT@CNT & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [67] \\ \hline Co-Sn/C nanofiber & Electrodepositing & C\({}_{4}\)H\({}_{6}\)CoO\({}_{4}\) & [90] \\ \hline SnCo/C nanofibers & Electrospinning & C\({}_{4}\)H\({}_{6}\)CoO\({}_{4}\) & [92] \\ \hline Sn-Co@PMMA nanospheres & Galvanic replacement & C\({}_{4}\)H\({}_{6}\)CoO\({}_{4}\) & [40] \\ \hline Amorphous Co\({}_{3}\)Sn\({}_{2}\) & Hydrothermal (180 \({}^{\circ}\)C, 24 h) & CoCl\({}_{2}\)*6H\({}_{2}\)O & [107] \\ \hline SnCo@CNT-3 DC & CVD & CoCl\({}_{2}\)*6H\({}_{2}\)O & [44] \\ \hline Sn-Co@C & Galvanic replacement & Co(NO\({}_{3}\))\({}_{2}\)*6H\({}_{2}\)O & [64] \\ \hline carbon encapsulated Sn-Co alloy & Heat treatment (800 \({}^{\circ}\)C, Ar/H\({}_{2}\)) & Co\({}_{3}\)O\({}_{4}\) & [41] \\ \hline NiCo\({}_{2}\)O\({}_{4}\) powders & Heat treatment (320 \({}^{\circ}\)C, air) & CoC\({}_{2}\)O\({}_{4}\) & [72] \\ \hline Co\({}_{2}\)MnSi & Arc-melting & Co powder & [96] \\ \hline Sb-Co-P & Electroplating & CoCl\({}_{2}\)*6H\({}_{2}\)O & [50] \\ \hline CoSnC alloy & Galvanic replacement & CoSO\({}_{4}\)*6H\({}_{2}\)O & [108] \\ \hline Co\({}_{2}\)SnO\({}_{4}\) HC@erGO & Heat treatment (900 \({}^{\circ}\)C, Ar) & CoCl\({}_{2}\)*6H\({}_{2}\)O & [39] \\ \hline CoSnO\({}_{3}\)/GN/CNTs & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [109] \\ \hline CoMn\({}_{2}\)O\({}_{4}\) & Hydrothermal (180 \({}^{\circ}\)C,10 h) & Co(CH\({}_{3}\)COO)\({}_{2}\) & [51] \\ \hline CoMn\({}_{2}\)O\({}_{4}\) & Hydrothermal (180 \({}^{\circ}\)C,10 h) & *4H\({}_{2}\)O & [52] \\ \hline CoSnO\({}_{3}\) & Galvanic replacement & CoCl\({}_{2}\)*6H\({}_{2}\)O & [52] \\ \hline Co\({}_{3}\)O\({}_{4}\) & Heat treatment (800 \({}^{\circ}\)C, Air) & CoCO\({}_{3}\) & [15] \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of the synthetic methods for cobalt-based electrode materials.