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Outsourcing has become a common and important link for enterprises. When selecting an outsourcing provider, single-valued neutrosophic linguistic sets can successfully express qualitative and fuzzy information. Furthermore, the selection of an outsourcing provider is a multi-criteria decision-making problem that can be tackled by the multi-attribute border approximation area comparison (MABAC) method. In MABAC, criteria are assumed to be compensatory. However, criteria may be non-compensatory in outsourcing provider selection. Thus, this paper introduces the main idea of the elimination and choice translating reality (ELECTRE) method. An MABAC-ELECTRE method is established under single-valued neutrosophic linguistic environments. This method uses the mean-squared deviation weight method to obtain the weights of criteria. Moreover, an illustrative example is conducted to explain the procedure of the MABAC-ELECTRE method. A comparative analysis verifies its feasibility in solving problems with non-compensatory criteria.

To bridge the gap of the alkali‐metal‐ion (Li or Na) batteries and supercapacitors, hybrid devices called capacitor batteries are being designed, which are adaptive for large‐scale energy‐storage systems. Two‐dimensional transition‐metal carbide materials (MXene) with high electronic conductivities have become capable electrode materials for supercapacitors. Herein, Ti3C2Tx synthesized by selectively etching the Al layer from the Ti3AlC2 presents a remarkable electrochemical performance as an electrode material for the supercapacitor with Li2SO4 or Na2SO4 aqueous electrolyte. It displays a capacitance of 243 F g−1 at a low current density of 100 mA g−1 with a capacitance retention of 95 % in the Li2SO4 electrolyte, and a capacitance of 150 F g−1 at a low current density of 200 mA g−1 with a capacitance retention of 95 % in the Na2SO4 electrolyte, which shows its potential application for capacitor batteries. Moreover, the LiMn2O4//Ti3C2Tx Li‐ion capacitor battery and MnO2//Ti3C2Tx Na‐ion capacitor battery are designed and assembled for the first time. Such rechargeable aqueous capacitor batteries display capable capacities, remarkable rate abilities, and excellent cycling performances, which further demonstrates that Ti3C2Tx is an outstanding capacitor‐type electrode material for capacitor batteries.