Why Your Battery Will Never Be the Same: The Irreversible Chemistry of Lithium-Ion Degradation
A smartphone bought in 2020 holds 100% of its original capacity. By 2023, that same phone struggles to hold 85%. The owner might blame charging habits, heat, or cheap manufacturing. But the real culprit is fundamental chemistry: every lithium-ion battery contains a limited supply of lithium atoms, and every charge-discharge cycle permanently consumes some of them. In 2019, M. Stanley Whittingham, John Goodenough, and Akira Yoshino received the Nobel Prize in Chemistry for developing the lithium-ion battery. Their work, spanning from the 1970s through the 1990s, created the energy storage technology that powers modern life. Yet the same electrochemistry that makes these batteries revolutionary also guarantees their eventual death. ...