A Smart Lithium Battery with Shape Memory Function

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Flexible and wearable electronics require robust energy storage solutions.
• Existing flexible batteries face challenges with mechanical deformations.
• Need for self-healing or shape-restoring energy storage devices.

Purpose of the Study:

• To design and fabricate a smart, flexible lithium-ion battery with shape memory function.
• To enable the battery to restore its shape after severe mechanical deformations.
• To explore shape programmability for advanced applications.

Main Methods:

• Integration of a shape-adjustable solid polymer electrolyte to induce shape memory.
• Fabrication of a flexible lithium-ion battery prototype.
• Testing battery performance under various mechanical stresses and thermal stimuli.

Main Results:

• The smart battery demonstrates shape recovery from bending, twisting, rolling, and elongation.
• Achieved a specific discharge capacity of ~140 mAh g⁻¹ at 0.2 C.
• Maintained ~92% capacity retention after 100 cycles with ~99.85% Coulombic efficiency.
• Showcased programmable shape adjustment in response to heat stimulus.

Conclusions:

• The developed smart battery offers resilience against mechanical damage for flexible electronics.
• Shape memory polymers provide a viable route for engineering responsive and durable energy storage.
• This approach has broad potential for various energy storage technologies.