One-step facile fabrication of N, S co-doped carbon modified NiS/MoS2 heterostructure microspheres with improved sodium storage performance

Tuning oxygen vacancies in MoS2@MoO2 hierarchical tubular heterostructures for high performance lithium-ion batteries

“…Furthermore, the capacitive capacity contribution is calculated based on the equation: i ( v ) = k 1 · v + k 2 · v 1/2 , where i ( v ) represents the measured current at a fixed potential ( v ), k 1 and k 2 are the adjustable constant parameters. 52 The capacitive capacity contribution is ∼75.0%, ∼78.1%, ∼80.9%, ∼84.3% and ∼88.6% at the scan rate of 0.2, 0.4, 0.6, 0.8, and 1.0 mV s −1 for the MoS 2 @MoO 2 -4 electrode, which are higher than those of MoS 2 @MoO 2 -1 (from 68.9% at 0.2 mV s −1 to 81.5% at 1.0 mV s −1 Fig. S16(c)) (ESI†), MoS 2 @MoO 2 -2 (from 68.2% at 0.2 mV s −1 to 83.1% at 1.0 mV s −1 Fig.…”

Rational construction of VSe2encapsulated in selenized polyacrylonitrile toward a high-rate capacity and wide temperature tolerance for potassium-ion batteries

“…Meanwhile, the diameter of the semicircle was smaller than that of the VSe 2 /SePAN composite in its pristine state, indicating that activation improved the reaction kinetics during the potassiation/depotassiation process. 54,55 Meanwhile, the K + diffusion kinetics in VSe 2 /SePAN was further estimated using the GITT technique, 56,57 and the findings are presented in Fig. 6d.…”

“…This phenomenon further implies the persistence of the conversion reaction and verifies the electrode's reaction mechanism with K + + VSe 2 ↔ K x VSe 2 ↔ V + K 2 Se. 20,23,[50][51][52][53][54][55][56][57][58][59][60][61][62][63] Additional evidence for the existence of V, Se, N, and K was provided by EDS mapping of the completely discharged state.…”

Manipulation of the MoO2/MoSe2 Heterointerface Boosting High Rate and Durability for Sodium/Potassium Storage

“…Sodium and potassium are abundant in reserve and low in price; thus, the sodium ion batteries (SIBs) and potassium ion batteries (PIBs) are regarded as the potential energy storage systems. , However, Na + /K + with a large radius results in slow electrochemical kinetics and unsatisfactory electrochemical performance. , Great effort has been made to explore adequate electrode materials which can effectively support and accelerate the insertion and extraction of Na + /K + . The heterostructure materials with built-in electric fields induced by unbalanced charge distribution at heterointerfaces have attracted much attention among energy storage systems, which could boost interfacial charge transfer and reaction kinetics. , Especially, there are some heterostructure composites, such as NiS/MoS 2 -C, SnO 2 /BaTiO 3 @NCNF, SnS@MoSe 2 -GR, and MoS 2 @MoO 2 -C, which were explored to improve energy storage performance in alkaline metal ion batteries. By utilizing the physicochemical characteristics of components, the resulting heterostructures ensure composites with multiple functions due to the interfacial interaction and synergistic effects.…”

“…The heterostructure materials with built-in electric fields induced by unbalanced charge distribution at heterointerfaces have attracted much attention among energy storage systems, which could boost interfacial charge transfer and reaction kinetics. 5,6 Especially, there are some heterostructure composites, such as NiS/MoS 2 -C, 7 SnO 2 /BaTiO 3 @NCNF, 8 SnS@ MoSe 2 -GR, 9 and MoS 2 @MoO 2 -C, 10 which were explored to improve energy storage performance in alkaline metal ion batteries. By utilizing the physicochemical characteristics of components, the resulting heterostructures ensure composites with multiple functions due to the interfacial interaction and synergistic effects.…”