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Pb‐based perovskite solar cells (PSCs) as one of the most promising photovoltaic technologies for commercialization have attracted tremendous attention in recent years. However, the toxicity and leakage of heavy metal Pb from perovskite film have become critical obstacles for eco‐friendly development. Extreme weather conditions such as heavy rain, high temperature, or strong sunlight may accelerate the undesired decomposition of perovskite film and cause inevitable Pb contamination in the ecosystem, which results in a potential threat to animals and the environment. In this review, guidelines for successfully managing Pb in PSCs are provided to open a pathway toward sustainable development. First, the toxicological research of Pb that can cause health problems for humans and contaminate the environment is discussed. Then, the decomposition mechanism of perovskite film and Pb leakage pathways under simulated environments in terms of moisture, high temperature, and illumination are briefly reviewed. Moreover, strategies to inhibit Pb leakage including physical sequestration, chemical adsorption, and Pb component substitution engineering are systematically summarized. Finally, different pathways for achieving the goal of Pb recycling and sustainable utilization are systematically analyzed. With a comprehensive understanding of these effects, rational strategies for sustainable Pb management can be made to accelerate the development of this emerging field. [ABSTRACT FROM AUTHOR]

In article number 1802431, Hongbin Lu and co‐authors demonstrate a multifunctional mediator based on a nickel cobalt double hydroxide (NiCo‐DH) composite for Li–S batteries. The NiCo‐DH plays an important role in suppressing the shuttle effect and accelerating the redox kinetics of LiPSs. The composite electrode can load high contents of sulfur (>85 wt%) and exhibit a superior capacity, ultrahigh rate performance, and ultralong life, with a decay rate of 0.015% per cycle. [ABSTRACT FROM AUTHOR]

The performance of lithium–sulfur (Li–S) batteries is largely hindered by the shuttle effect caused by the dissolution of lithium polysulfides (LiPSs) and the sluggish reaction kinetics of LiPSs. Here, it is demonstrated that the nickel–cobalt double hydroxide (NiCo‐DH) shells that encapsulate sulfur nanoparticles can play multiple roles in suppressing the shuttle effect and accelerating the redox kinetics of LiPSs by combining with graphene and carbon nanotubes to construct the conductive networks. The NiCo‐DH shell that intimately contacts with sulfur physically confines the loss of sulfur and promotes the charge transfer and ion diffusion. More importantly, it can react with LiPSs to produce the surface‐bound intermediates, which are able to anchor the soluble LiPSs and accelerate the redox kinetics. Such composite electrodes can load high contents of sulfur (>85 wt%) and the resulting Li–S battery exhibits a superior capacity (1348.1 mAh g−1 at 0.1 C), ultrahigh rate performance (697.7 mAh g−1 at 5 C), and ultralong cycle life (1500 cycles) with a decay rate of 0.015% per cycle. The nickel–cobalt double hydroxide composite can play multiple roles in suppressing the shuttle effect and accelerating the redox kinetics of lithium polysulfides. Such composite electrodes can load high contents of sulfur (>85 wt%) and the resulting lithium–sulfur battery exhibits a superior capacity, ultrahigh rate performance, and ultralong life with a decay rate of 0.015% per cycle. The mechanism is investigated in detail. [ABSTRACT FROM AUTHOR]