This review article lead by Daniel Vallejo and Joe Corstvet entitled “Triboelectric nanogenerators: Low-cost power supplies for improved electrospray ionization” published in the International Journal of Mass Spectrometry highlights the fundamentals of ESI driven by DC power supplies, its contrasting qualities to triboelectric nanogenerator power supplies, and its applications to three distinct fields of research: forensics, metabolomics, and protein structure analysis.