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Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation performance. In this work, we reported the effect of MgCo2O4 nanosheets on the thermal decomposition of ammonium perchlorate (NH4ClO4, AP)-based energetic molecular perovskites (AP-based energetic molecular perovskites). The morphology and structure of the MgCo2O4 nanosheets were characterized. And their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites (H2pz)[NH4(ClO4)3] (PAP-4), (H2dabco)[NH4(ClO4)3] (DAP-4), (H2mpz)[NH4(ClO4)3] (PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4) was analyzed. The results showed that MgCo2O4 nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular perovskites. After adding MgCo2O4 nanosheets, the thermal decomposition peak temperatures of PAP-4, DAP-4, PAP-M4, and PAP-H4 had been reduced by 35.7 °C, 48.4 °C, 37.9 °C, and 43.6 °C, respectively. And the activation energy (Ea) of the thermal decomposition of AP-based energetic molecular perovskites had been reduced, the Ea of PAP-H4 decreased by 46.4 kJ/mol at most among them. The catalytic mechanism of MgCo2O4 nanosheets for AP-based energetic molecular perovskites is analyzed. This work provides a reference for the future application of AP-based energetic molecular perovskites.

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation performance. In this work, we reported the effect of MgCo2O4 nanosheets on the thermal decomposition of ammonium perchlorate (NH4ClO4, AP)-based energetic molecular perovskites (AP-based energetic molecular perovskites). The morphology and structure of the MgCo2O4 nanosheets were characterized. And their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites (H2pz)[NH4(ClO4)3] (PAP-4), (H2dabco)[NH4(ClO4)3] (DAP-4), (H2mpz) [NH4(ClO4)3] (PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4) was analyzed. The results showed that MgCo2O4 nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular perovskites. After adding MgCo2O4 nanosheets, the thermal decomposition peak temperatures of PAP-4, DAP-4, PAP-M4, and PAP-H4 had been reduced by 35.7 °C, 48.4 °C, 37.9 °C, and 43.6 °C, respectively. And the activation energy (Ea) of the thermal decomposition of AP-based energetic molecular perovskites had been reduced, the Ea of PAP-H4 decreased by 46.4 kJ/mol at most among them. The catalytic mechanism of MgCo2O4 nanosheets for AP-based energetic molecular perovskites is analyzed. This work provides a reference for the future application of AP-based energetic molecular perovskites. [ABSTRACT FROM AUTHOR]

• MgCo 2 O 4 nanosheets were first synthesized via facile hydrothermal method. • The MgCo 2 O 4 nanosheets showed high specific capacitances of 1431.2 F g−1. • The ASC device delivers a high energy density of 32 Wh·kg−1. • It displays a remarkable cyclic performance of 6.3% loss after 10,000 cycles. Two dimensional (2D) spinel cobaltite has great potential in electrochemical energy storage due to its unique structure and remarkable performance. Herein, we reported for a successful synthesis of MgCo 2 O 4 nanosheets through direct hydrothermal decomposition of a mixed aqueous solution of MgCl 2 and CoCl 2 and formic acid (HCOOH, FA) at 200 °C for 6 h. The MgCo 2 O 4 nanosheets yield a specific capacitance of 1431.2 F·g−1 at 1.0 A·g−1 in a three-electrode system and a high energy density of 32 Wh·kg−1 at a power density of 800 W·kg−1 in an aqueous asymmetric supercapacitor (MgCo 2 O 4 thin sheets (+)//active carbon (AC) (−)). The MgCo 2 O 4 nanosheets display potential applications in electrochemical energy storage. [ABSTRACT FROM AUTHOR]