21:T4c4,Producing hydrogen using anion exchange membrane (AEM) water electrolysis is a promising approach to address the severe energy crisis facing human society. AEM electrolysis can be integrated with intermittent and sustainable energy sources, utilize low-cost electrocatalysts and other inexpensive components in stacks. The sporadic investigation on catalysts and membrane development of AEM electrolysis enable it still under the early stage of development. To enable commercially viable hydrogen generation, deeper understanding and improvement of AEM electrolysis technology is imperative, including power efficiency, stack feasibility, membrane stability, ion conductivity, robustness and cost reduction. In this review, the basic principles, progress and challenges of AEM are discussed. We highlight recent achievements in electrocatalysts, alkaline exchange membranes, ionomers, and the resulting AEM electrolyser performance. In particular, development challenges facing AEM electrolysis are summarized. Hopefully, this review paper will attract additional interest to close technical gaps, while providing practical research recommendations for AEM electrolysis research, leading to scalable hydrogen production.22:T447,Aryl-ether-free anion-exchange ionomers (AEIs) and membranes (AEMs) have become an important benchmark to address the insufficient durability and power-density issues associated with AEM fuel cells (AEMFCs). Here, we present aliphatic chain-containing poly(diphenyl-terphenyl piperidinium) (PDTP) copolymers to reduce the phenyl content and adsorption of AEIs and to increase the mechanical properties of AEMs. Specifically, PDTP AEMs possess excellent mechanical properties (storage modulus>1800 MPa, tensile strength>70 MPa), H₂ fuel-barrier properties (<10 Barrer), good ion conductivity, and ex-situ stability. Meanwhile, PDTP AEIs with low phenyl content and high-water permeability display excellent peak power densities (PPDs). The present AEMFCs reach outstanding PPDs of 2.58 W cm^-2 (>7.6 A cm^-2 current density) and 1.38 W cm^-2 at 80 °C in H₂ /O₂ and H₂ /air, respectively, along with a specific power (PPD/catalyst loading) over 8 W mg^-1 , which is the highest record for Pt-based AEMFCs so far.23:T61a,

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