Take a look at the great cover images from the January issues and top five most downloaded articles this month.

Cover from Ilias Belharouak, Arumugam Manthiram, Yang-Kook Sun and co-workers.

Issue 1

Lithium-Sulfur Batteries

In article number 1501480, Ilias Belharouak, Arumugam Manthiram, Yang-Kook Sun and co-workers develop a high-capacity, high-rate sulfur cathode by encapsulating elemental sulfur into the pores of hollow-mesoporous TiO₂particles that are connected via carbon nanotubes. Moreover, a dual functional carbon-paper interlayer provides a medium for scavenging the lithium polysulfides and suppressing them from diffusing to the anode side. The Li-S cells demonstrate the viability of high-energy, high-power Li-S batteries.

Cover from Sang-Young Lee and co-workers.

Issue 2

Cathode Materials

In article number 1501594, Sang-Young Lee and co-workers demonstrate a heteronanomat cathode (HM cathode) as an effective and versatile electrode platform to address the long-standing challenges of conventional cathodes. The HM cathode is fabricated via a simultaneous electrospraying and electrospinning process without the use of binders, carbon powder additives, or metallic foil current collectors. The material/structural uniqueness of the HM cathode provides substantial improvements in redox reaction kinetics, cycling performance and ultrahigh-areal capacity far beyond those achievable with conventional cathode technologies.

Top five most downloaded papers:

Solid‐State Solar Thermal Fuels for Heat Release Applications

by David Zhitomirsky, Eugene Cho, and Jeffrey C. Grossman

Amorphous Cobalt Boride (Co2B) as a Highly Efficient Nonprecious Catalyst for Electrochemical Water Splitting: Oxygen and Hydrogen Evolution

by Justus Masa, Philipp Weide, Daniel Peeters, Ilya Sinev, Wei Xia, Zhenyu Sun, Christoph Somsen, Martin Muhler, and Wolfgang Schuhmann

A Hierarchical N/S‐Codoped Carbon Anode Fabricated Facilely from Cellulose/Polyaniline Microspheres for High-Performance Sodium-Ion Batteries

by Dingfeng Xu, Chaoji Chen, Jia Xie, Bao Zhang, Ling Miao, Jie Cai, Yunhui Huang, and Lina Zhang

Free‐Standing Nitrogen‐Doped Carbon Nanofiber Films: Integrated Electrodes for Sodium‐Ion Batteries with Ultralong Cycle Life and Superior Rate Capability

by Suqing Wang, Lu Xia, Le Yu, Lei Zhang, Haihui Wang, and Xiong Wen (David) Lou

Solvent-Mediated Dimension Tuning of Semiconducting Oxide Nanostructures as Efficient Charge Extraction Thin Films for Perovskite Solar Cells with Efficiency Exceeding 16%

by Wu-Qiang Wu, Fuzhi Huang, Dehong Chen, Yi-Bing Cheng, Rachel A. Caruso