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In the data‐driven world, textile is a valuable resource for improving the quality of life through continuous monitoring of daily activities and physiological signals of humans. Triboelectric nanogenerators (TENG) are an attractive option for self‐powered sensor development by coupling energy harvesting and sensing ability. In this study, to the best of the knowledge, scalable fabrication of Ti3C2Tx MXene‐embedded polyvinylidene fluoride (PVDF) nanocomposite fiber using a thermal drawing process is presented for the first time. The output open circuit voltage and short circuit current show 53% and 58% improvement, respectively, compared to pristine PVDF fiber. The synergistic interaction between the surface termination groups of MXene and polar PVDF polymer enhances the performance of the fiber. The flexibility of the fiber enables the weaving of fabric TENG devices for large‐area applications. The fabric TENG (3 × 2 cm2) demonstrates a power density of 40.8 mW m−2 at the matching load of 8 MΩ by maintaining a stable performance over 12 000 cycles. Moreover, the fabric TENG has shown the capability of energy harvesting by operating a digital clock and a calculator. A distributed self‐powered sensor for human activities and walking pattern monitoring are demonstrated with the fabric.

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Spinel LiMn 2 O 4 and multidoped spinel LiMn 1.9 Co 0.025 Cr 0.025 Ni 0.025 Fe 0.025 O 4 were synthesized by the glycine-nitrate method and coated with lithium borosilicate (LBS) in order to enhance the electrochemical performance at room temperature. The structure and electrochemical performance of all samples were characterized by inductively coupled plasma-mass spectrometer (ICP-MS), X-ray diffraction (XRD), differential thermal analysis/thermogravimetry (DTA/TG), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), atomic force microscopy (AFM) and galvanostatic charge-discharge measurements. The XRD analysis shows that the samples exhibit a pure spinel phase. The SEM results indicated that LBS particles had encapsulated the surface of the undoped and multidoped LiMn 2 O 4 without causing any structural change. The charge-discharge tests showed that LiMn 1.9 Co 0.025 Cr 0.025 Ni 0.025 Fe 0.025 O 4 displays better cycling performance than the pristine LiMn 2 O 4 at room temperature. However, in the same conditions, LBS-coated LiMn 1.9 Co 0.025 Cr 0.025 Ni 0.025 Fe 0.025 O 4 and LiMn 2 O 4 have better cycling performance than uncoated samples. The results suggest that multidoped and LBS-coated LiMn 2 O 4 could develop into a promising cathode material for lithium ion batteries.