当前位置：
X-MOL 学术
›
Adv. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Highly Reversible Lithium Metal Anode Enabled by 3D Lithiophilic–Lithiophobic Dual-Skeletons
Advanced Materials ( IF 27.4 ) Pub Date : 2023-01-26 , DOI: 10.1002/adma.202211203 Piao Qing 1 , Zhibin Wu 1 , Anbang Wang 2 , Shaozhen Huang 1 , Kecheng Long 1 , Tuoya Naren 1 , Dongping Chen 1 , Pan He 1 , Haifeng Huang 1 , Yuejiao Chen 1 , Lin Mei 1 , Libao Chen 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-01-26 , DOI: 10.1002/adma.202211203 Piao Qing 1 , Zhibin Wu 1 , Anbang Wang 2 , Shaozhen Huang 1 , Kecheng Long 1 , Tuoya Naren 1 , Dongping Chen 1 , Pan He 1 , Haifeng Huang 1 , Yuejiao Chen 1 , Lin Mei 1 , Libao Chen 1
Affiliation
|
Lithium metal is a promising anode for high-energy-density lithium batteries, but its practical application is still hindered by intrinsic defects such as infinite volume expansion and uncontrollable dendrite growth. Herein, a dendrite-free 3D composite Li anode (Li-B@SSM) is prepared by mechanical rolling of lithiophilic LiB nanofibers supported by Li–B composite and lithiophobic stainless-steel mesh (SSM). Featuring hierarchical lithiophilic–lithiophobic dual-skeletons, the Li-B@SSM anode shows an ultrahigh Coulombic efficiency of 99.95% and a long lifespan of 900 h under 2 mA cm−2/1 mAh cm−2. It is demonstrated that the abnormally reversible Li stripping/plating processes should be closely related to the site-selective plating behavior and spatial confinement effect induced by the robust lithiophilic–lithiophobic dual-skeletons, which alleviates the volume changes, suppresses the growth of Li dendrites, and reduces the accumulation of “dead” Li. More importantly, the application feasibility of the Li-B@SSM anode is also confirmed in full batteries, of which the Li-B@SSM|LiFePO4 full cell shows a high capacity retention of 97.5% after 400 cycles while the Li-B@SSM|S pouch battery exhibits good cycle stability even under practically harsh conditions. This work paves the way for the facile and efficient fabrication of high-efficiency Li metal anodes toward practical applications.
中文翻译：
由 3D 亲锂-疏锂双骨架实现的高度可逆锂金属阳极
锂金属是一种很有前途的高能量密度锂电池负极，但其实际应用仍然受到体积无限膨胀和枝晶生长不可控等固有缺陷的阻碍。在此，无枝晶的 3D 复合锂负极 (Li-B@SSM) 通过机械轧制由 Li-B 复合材料和疏锂不锈钢网 (SSM) 支撑的亲锂 LiB 纳米纤维制备。Li-B@SSM 负极具有分级亲锂-疏锂双骨架，在 2 mA cm -2 /1 mAh cm -2 下显示出 99.95% 的超高库仑效率和 900 小时的长寿命. 结果表明，异常可逆的锂剥离/镀层过程应与稳健的亲锂-疏锂双骨架诱导的位点选择性沉积行为和空间限制效应密切相关，从而减轻体积变化，抑制锂枝晶的生长，并减少“死”李的积累。更重要的是，Li-B@SSM负极在全电池中的应用可行性也得到证实，其中Li-B@SSM|LiFePO 4 全电池在400次循环后容量保持率高达97.5%，而Li-B @SSM|S 软包电池即使在实际恶劣的条件下也表现出良好的循环稳定性。这项工作为简便高效地制备高效锂金属负极走向实际应用铺平了道路。
更新日期：2023-01-26
中文翻译：
由 3D 亲锂-疏锂双骨架实现的高度可逆锂金属阳极
锂金属是一种很有前途的高能量密度锂电池负极，但其实际应用仍然受到体积无限膨胀和枝晶生长不可控等固有缺陷的阻碍。在此，无枝晶的 3D 复合锂负极 (Li-B@SSM) 通过机械轧制由 Li-B 复合材料和疏锂不锈钢网 (SSM) 支撑的亲锂 LiB 纳米纤维制备。Li-B@SSM 负极具有分级亲锂-疏锂双骨架，在 2 mA cm -2 /1 mAh cm -2 下显示出 99.95% 的超高库仑效率和 900 小时的长寿命. 结果表明，异常可逆的锂剥离/镀层过程应与稳健的亲锂-疏锂双骨架诱导的位点选择性沉积行为和空间限制效应密切相关，从而减轻体积变化，抑制锂枝晶的生长，并减少“死”李的积累。更重要的是，Li-B@SSM负极在全电池中的应用可行性也得到证实，其中Li-B@SSM|LiFePO 4 全电池在400次循环后容量保持率高达97.5%，而Li-B @SSM|S 软包电池即使在实际恶劣的条件下也表现出良好的循环稳定性。这项工作为简便高效地制备高效锂金属负极走向实际应用铺平了道路。
京公网安备 11010802027423号