Engineering metal selenides for sodium-and potassium-ion batteries

A mini-review focusing on ambient-pressure chemical vapor deposition (AP-CVD) based synthesis of layered transition metal selenides for energy storage applications

“…Other reports of TMSes (synthesized mostly by hydrothermal routes) for energy storage are discussed in a recent review which shows the challenges and progress in using transition metal selenides to electrochemically store Na + and K + . 52…”

Interphases in the electrodes of potassium ion batteries

“…Owing to high energy density and mature industrial manufacturing, lithium-ion batteries (LIBs) are the most extensively used method of rechargeable energy storage, found in electric vehicles, portable electronic devices, and grid energy storage [5][6][7]. However, low lithium reserves (0.0017 wt%) in the Earth's crust, coupled with rapidly rising depletion and an imbalanced geographical distribution, raise concerns about the sustainable development and long term future of LIBs [8]. As alternatives to LIBs, other alkali metal ion batteries such as sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) have been extensively studied due to similar electrochemical properties of these alkali metals and high abundancies of Na (2.36 wt%) and K (2.09 wt%) [9].…”

Electrochemical performance of CoSe2 with mixed phases decorated with N-doped rGO in potassium-ion batteries

“…6,20 The volume changes buffered by the construction of metal-carbon and selenium-carbon chemical bonds, improving the electrochemical performance. 6,21 Aer the development in recent years, transition metal selenides with different nano-morphologies, such as CoSe 2 , Ni 3 Se 4 , MoSe 2 , etc., are oen used as anode materials for PIBs. 22,23 These transition metal selenides coated with different morphologies and types of carbon show good cycle stability and large residual capacitance in PIBs.…”

“…The working principles of PIBs and LIBs are similar, and the reserves of potassium resources are relatively rich, the cost is low, and the redox potential of PIBs is very close to that of lithium (K + /K: À2.93 V; Li + /Li: À3.04 V). 5,6 Therefore, PIBs are one of the ideal substitutes for LIBs, especially in large-scale energy storage applications. Although theoretically feasible, there are still some difficulties in the application of PIBs.…”