Constructing NiCo₂Se₄/NiCoS₄ heterostructures for high-performance rechargeable aluminum battery cathodes

Abstract

An aluminum battery based on the NiCo2Se4/NiCoS4 cathode delivers a capacity of 112 mA h g−1 after 195 cycles. The charge–discharge principle of the NiCo2Se4/NiCoS4 cathode is the Al3+ intercalation and valence state transition of the Ni, Co, and S elements.

Interfacial Coupling FeSe2/MoS2 Heterostructure as a Promising Cathode for Aluminum-Ion Batteries

“…For the charge/discharge curves (Figure d), the discharge potential plateau around 0.3 V and charge potential plateau around 1.1 V are well consistent with the previous CV profiles. Figure e indicates that the heterostructured FeSe 2 /MoS 2 is provided with superior electrochemical performance among the outstanding cathode materials that have been reported. ,− In general, the heterostructured FeSe 2 /MoS 2 exhibits splendid reversible capacity, cycling stability, and rate performance, which are attributed to the good reaction kinetics and structural stability resulting from interfacial engineering.…”

“…It is worth pointing out that interfacial engineering is considered as a fantastic method to heighten electrochemical storage performance. The built-in electric field formed at the interfaces of the heterogeneous mixture is anticipated to lower the diffusion barrier and speed up the mobility of charge carriers by enhancing the kinetics of the interfacial reaction, thereby expected to significantly enhance the extraction/intercalation of AlCl 4 – during cycling. , Furthermore, the abundance of defects and lattice distortion at interfaces will provide facile ion diffusion pathways and additional reaction active sites for electrochemical storage.…”

“…− during cycling. 23,24 Furthermore, the abundance of defects and lattice distortion at interfaces will provide facile ion diffusion pathways and additional reaction active sites for electrochemical storage.…”

Modification of 2D materials using MoS2as a model for investigating the Al-storage properties of diverse crystal facets

“…The intensity of Al 2p in the fully discharged state was distinctly stronger than that in the fully charged state, conrming that the embedding of Al 3+ cations occurs during the discharging process. 45,46 In the Cl 2p spectra, the peaks at 202.5 eV and 200.7 eV showed limited variation at 0.01 V and 1.8 V. Interestingly, the characteristic peak of the Al-Cl bond located at 198.9 eV became signicantly stronger at 1.8 V, which reects that the AlCl 4 − anions may also act as carriers and are embedded in cathode during the charging process. 47,48 Therefore, it can be concluded that the S-MoS 2 cathode operates through the coordination of Al 3+ and AlCl 4 − .…”