文献类型：期刊文献

英文题名：Etch-driven N, P co-doped hierarchical porous carbon embedded with Ni nanoparticles as an efficient dynamic carrier for room-temperature Na-S battery

作者：He, Qiuchen[1,2];Zhu, Yunpeng[3];Li, Yong[2];Ma, Sen[2];Wang, Dianlong[1];Xie, Jingying[1,2]

机构：[1]Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Peoples R China;[2]Shanghai Inst Space Power, State Key Lab Space Power Sources, Shanghai 200245, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：74

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001105258600001)】；

语种：英文

外文关键词：Hierarchical porous carbon; Ni nanoparticles embedding; RT Na-S batteries; Cycling stability

摘要：Shuttle effect in Room temperature sodium-sulfur (RT NaS) batteries in ether-based electrolyte is difficult to avoid and reduces the cycle performance. Small molecule sulfur with short chain structure (e.g. S-2 similar to 4) can avoid shuttle effect but low conductivity. In this paper, a N, P co-doped hierarchical porous carbon embedded with Ni nanoparticles (Ni@NPC) is developed by heat-treatment method using commercially phosphorus-containing chelating resin for waste water as the precursor, which adsorb Ni2+ by both physical and chemical process. The micro-pores in the Ni@NPC composite provide the matrix for S-2 similar to 4, the mesoporous-macropore are conductive to the transmission of electrolyte and the carbon skeleton together with Ni nano-particles facilitate the electron transport. As a result, Ni@NPC/S cathode exhibits a sodium diffusion coefficient of the order of 10(-7)- 10(-9), which is better than reported literatures. Similarly, Ni@NPC/S has excellent cycling performance (maintained at a specific capacity of 231.5 mAh g(-1) after 7000 cycles at 5 A g(-1), with an average decay rate of 0.004 % per cycle) and rate performance (258.3 mAh g(-1) at a high current density of up to 10 A g(-1)).