fig4

From: Bringing real-time observability to practical aqueous zinc-ion batteries

Figure 4. (A) The setup and principle of in-situ monitoring of Zn anode interface; (B) The setup and principle of Acoustic emission sensor; (C and D) The waveform detected when the bubble bursts of sensor b and the destruction of graphite of sensor b. (C and D) Reprinted from Ref.^[35] under the CC BY 4.0 license; (E) In-situ experimental demonstration of sensor a. (E) Reprinted from Ref.^[34] under the CC BY 4.0 license. TFBG: Tilted fiber Bragg grating; SPR: surface plasmon resonance; SCE: saturated calomel electrode.