“…Vibration energy harvesting technology is a reliable solution to this problem. According to different working principles, vibration energy harvesting technology can be divided into piezoelectric (PEG) [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ], electromagnetic (EMG) [ 10 , 11 , 12 ], electrostatic [ 13 , 14 ], thermoelectric [ 15 , 16 ] and triboelectric (TEG) [ 17 , 18 ]. Among them, PEG has attracted extensive attention because of its advantages of small external influence, high energy density and easy miniaturization.…”