A wide variety of applications ranging from electric vehicles and portable devices to wearable devices impose ever-increasing demand for high-energy-density battery technologies. Due to the lowest electrochemical potential and the highest theoretical specific capacity, lithium (Li) metal has been recognized as the ultimate choice of anode to achieve high-energy-density battery systems.

With the rapid growth of the digital economy, developing rechargeable batteries with stable and high energy has been pushed to an extremely urgent level. LiCoO2 (LCO) is one of the utmost successful cathode materials for lithium-ion batteries (LIBs) because of its several inherent advantages, including ultra-high tapping density, high-voltage plateau, and ease of mass production.

Topological semimetals have a linear-dispersed low energy excitation, exhibiting significant responses to a magnetic field. Some of them also have an excellent magneto-thermoelectric performance.

Thermoelectric materials, as a kind of green energy material that can convert “heat energy” into “electricity” without external force, can use the ubiquitous environmental heat energy to provide continuous power supply for small sensors or electronic devices in the Internet of Things (IoT) system.

Electronic skins (e-skins) are devices that can respond to mechanical stimuli and convert mechanical information to digital signals. A great challenge for existing e-skins is that they may easily fail under extreme mechanical conditions due to their multilayered architecture with mechanical mismatch and weak adhesion between the interlayers.