| Alloying-type anode |
High potassium storage capability |
Huge volume change; side reactions; poor cycling stability |
| Intercalation-type compound |
Enhanced initial coulombic efficiency; impressive working stability |
Low specific capacity; high working voltage |
| Conversion-type anode |
Good specific capacity; facile synthesis process |
Unstable structural re-alignment; large voltage hysteresis |
| Compound anodes with multiple potassium storage behaviors |
Diverse chemical sources; rationally designed potassium storage |
Synthesis process is relatively difficult; complicated reaction behavior |
| Carbonaceous anodes |
For disordered carbonaceous anode: prolonged cycling stability |
For disordered carbonaceous anode: enhanced average operation voltage; low coulombic efficiency |
| For graphite: low cost; direct utilization without further treatment |
For graphite: voltage polarization; low rate performances |
| Organic anodes |
Good processability; a wide range of sources |
Solubility in organic electrolyte; low energy density; inferior electronic conductivity |
