This collection features 10 selected papers on next-generation energy storage, focusing on emerging battery technologies and supercapacitors, all of which were recently published in our journal, Nanomaterials (ISSN: 2079-4991). The featured papers cover material innovations ranging from MXene/MOF composites and heterostructures to biomass-derived carbon, with research addressing critical challenges in stability, capacity, and low-temperature operation for systems such as lithium–sulfur, sodium-ion, and lithium–oxygen batteries. We believe the following papers will be of great interest to readers with a focus on this field:

1. “MXene/MOF-Derived Composites with Multidimensional Nanostructures: Synthesis Methods, Performance, and Applications in the Field of Energy Storage”
by Shufan Feng, Shilong Wen, Rutao Wang, Xiaokun Yang, Xiangsen Yuan, Yuxuan Liu, Jingyun Ma and Zhaoqiang Li
Nanomaterials 2025, 15(11), 841; https://doi.org/10.3390/nano15110841
Available online: https://www.mdpi.com/2079-4991/15/11/841

2. “Perspectives on Advanced Lithium–Sulfur Batteries for Electric Vehicles and Grid-Scale Energy Storage”
by Wei Ni
Nanomaterials 2024, 14(12), 990; https://doi.org/10.3390/nano14120990
Available online: https://www.mdpi.com/2079-4991/14/12/990

3. “Sodium-Ion Battery at Low Temperature: Challenges and Strategies”
by Yan Zhao, Zhen Zhang, Yalong Zheng, Yichao Luo, Xinyu Jiang, Yaru Wang, Zhoulu Wang, Yutong Wu, Yi Zhang, Xiang Liu et al.
Nanomaterials 2024, 14(19), 1604; https://doi.org/10.3390/nano14191604
Available online: https://www.mdpi.com/2079-4991/14/19/1604

4. “Review of Biomass-Derived Carbon Nanomaterials—From 0D to 3D—For Supercapacitor Applications”
by Yihong Yan, Weiqiang Sun, Yuxin Wei, Kuankuan Liu, Jingjing Ma and Guang Hu
Nanomaterials 2025, 15(4), 315; https://doi.org/10.3390/nano15040315
Available online: https://www.mdpi.com/2079-4991/15/4/315

5. “Self-Powered Dual-Band Electrochromic Supercapacitor Devices for Smart Window Based on Ternary Dielectric Triboelectric Nanogenerator”
by Tianxiang Zheng, Haonan Zhang, Chen Chen, Xinbo Tu, Lin Fang, Mingjie Zhang, Wen He and Peihong Wang
Nanomaterials 2024, 14(2), 229; https://doi.org/10.3390/nano14020229
Available online: https://www.mdpi.com/2079-4991/14/2/229

6. “Short-Chain Sulfur Confined into Nitrogen-Doped Hollow Carbon Nanospheres for High-Capacity Potassium Storage”
by Wenhan Liu, Tengfei Shi, Fang Liu, Chen Yang, Fan Qiao, Kang Han, Chunhua Han, Jiashen Meng and Xuanpeng Wang
Nanomaterials 2024, 14(6), 550; https://doi.org/10.3390/nano14060550
Available online: https://www.mdpi.com/2079-4991/14/6/550

7. “Binder-Free Three-Dimensional Porous Graphene Cathodes via Self-Assembly for High-Capacity Lithium–Oxygen Batteries”
by Yanna Liu, Wen Meng, Yuying Gao, Menglong Zhao, Ming Li and Liang Xiao
Nanomaterials 2024, 14(9), 754; https://doi.org/10.3390/nano14090754
Available online: https://www.mdpi.com/2079-4991/14/9/754

8. “High–Energy–Density Fiber Supercapacitor Based on Graphene-Enhanced Hierarchically Nanostructured Conductive Polymer Composite Electrodes”
by Chuangen Ye, Qingfeng Yang, Mingxian Xu, Haitang Qiu, Xiaozhen Zhang, Jianping Ma, Haiyang Gao, Xuansheng Feng and Yong Li
Nanomaterials 2025, 15(17), 1350; https://doi.org/10.3390/nano15171350
Available online: https://www.mdpi.com/2079-4991/15/17/1350

9. “The Design of the Ni₃N/Nb₄N₅ Heterostructure as Bifunctional Adsorption/Electrocatalytic Materials for Lithium–Sulfur Batteries”
by Xialei Li, Wen Shang, Shan Zhang, Chun Xu, Jiabiao Lian and Guochun Li
Nanomaterials 2025, 15(13), 1015; https://doi.org/10.3390/nano15131015
Available online: https://www.mdpi.com/2079-4991/15/13/1015

10. “Hybrid-Mechanism Synergistic Flexible Nb₂O₅@WS₂@C Carbon Nanofiber Anode for Superior Sodium Storage”
by Yang Zhao, Ziwen Feng, Yipeng Tan, Qinglin Deng and Lingmin Yao
Nanomaterials 2024, 14(7), 631; https://doi.org/10.3390/nano14070631
Available online: https://www.mdpi.com/2079-4991/14/7/631