Nanomaterials
·
2022
·Vol. 12
·期 5
·886
·
IF 5.719
Qianwen Jin,Yajing Yan,Chenchen Hu,Yongguang Zhang,Xi Wang,Chunyong Liang
The advantages of high energy density and low cost make lithium–sulfur batteries one of the most promising candidates for next-generation energy storage systems. However, the electrical insulativity of sulfur and the serious shuttle effect of lithium polysulfides (LiPSs) still impedes its further development. In this regard, a uniform hollow mesoporous Ni(OH)2@CNT microsphere was developed to address these issues. The SEM images show the Ni(OH)2delivers an average size of about 5 μm, which is composed of nanosheets. The designed Ni(OH)2@CNT contains transition metal cations and interlayer anions, featuring the unique 3D spheroidal flower structure, decent porosity, and large surface area, which is highly conducive to conversion systems and electrochemical energy storage. As a result, the as-fabricated Li-S battery delivers the reversible capacity of 652 mAh g−1after 400 cycles, demonstrating excellent capacity retention with a low average capacity loss of only 0.081% per cycle at 1 C. This work has shown that the Ni(OH)2@CNT sulfur host prepared by hydrothermal embraces delivers strong physical absorption as well as chemical affinity.Keywords:Li-S battery;carbon nanotube;nickel hydroxide;cathode
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Pengran Gao,Weixin Lv,Rui Zhang,Yi Liu,Guanghua Li,Xianfu Bu,Lixu Lei
We have developed a novel route to make new batteries from spent ones, in which we obtain and regenerate the active materials of positive electrode and negative electrode respectively. For the spent lead acid batteries , the positive electrode active materials contain both PbSO 4 and PbO 2 . To make full use of them, we have to investigate the treatment of the mixtures rather than only PbO 2 , which we have reported previously. Here we report our investigation on three mixtures of PbSO 4 and PbO 2 in different mole ratios, as well as the electrode materials directly from the spent batteries. The mixtures are firstly desulphated, and then solvothermally processed in methanol at 140 °C for 24 h. The as-obtained solids contain both PbO·PbCO 3 and PbCO 3 , which have been calcined to form α-PbO. The α-PbO powders are similar irregular particles and highly electrochemically active, which discharge around 170 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2530
·
IF 5.719
Xiaoping Tan,Gaoli Guo,Kaidi Wang,Huang Zhang
Aqueous zinc-ion batteries offer the greatest promise as an alternative technology for low-cost and high-safety energy storage. However, the development of high-performance cathode materials and their compatibility with aqueous electrolytes are major obstacles to their practical applications. Herein, we report the synthesis of orthorhombic V2O5·nH2O nanorods as cathodes for aqueous zinc batteries. As a result, the electrode delivers a reversible capacity as high as 320 mAh g−1at 1.0 A g−1and long-term cycling stability in a wide window of 0.2 to 1.8 V using a mild ZnSO4aqueous electrolyte. The superior performance can be attributed to the improved stability of materials, inhibited electrolyte decomposition and facilitated charge transfer kinetics of such materials for aqueous zinc storage. Furthermore, a full cell using microsized Zn powder as an anode within capacity-balancing design exhibits high capacity and stable cycling performance, proving the feasibility of these materials for practical application.Keywords:zinc batteries;V2O5·nH2O nanorods;cathode materials;Zn anode;aqueous batteries
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaohui Peng,Mingzhe Li,Lihua Huang,Qizhe Chen,Weiwei Fang,Yuyang Hou,Yusong Zhu,Jilei Ye,Lili Liu,Yuping Wu
Developing ideal Li–O2 batteries (LOBs) requires the discharge product to have a large quantity, have large contact area with the cathode, and not passivate the porous surface after discharge, which put forward high requirement for the design of cathodes. Herein, combining the rational structural design and high activity catalyst selection, minor amounts of RuO2-incorporated Co3O4 nanoneedles grown on carbon cloth are successfully synthesized as binder-free integrated cathodes for LOBs. With this unique design, plenty of electron–ion–oxygen tri-phase reaction interface is created, the side reaction from carbon is isolated, and oxygen reduction reaction/oxygen evolution reaction (OER) kinetics are significantly facilitated. Upon discharge, film-like Li2O2 is observed growing on the needle surface first and eventually ball-like Li2O2 particles form at each tip of the needle. The cathode surface remains porous after discharge, which is beneficial to the OER and is rare in the previous reports. The battery exhibits a high specific discharge capacity (7.64 mAh cm–2) and a long lifespan (500 h at 0.1 mA cm–2). Even with a high current of 0.3 mA cm–2, the battery achieves a cycling life of 200 h. In addition, punch-type LOBs are fabricated and successfully operated, suggesting that the cathode material can be utilized in ultralight, flexible electronic devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2014
·Vol. 18
·期 7
·2027-2033
·
IF 2.234
Chen Dongrui,Li Benzhen,Liao Youhao,Lan Hongwei,Lin Haibin,Xing Lidan,Wang Yating,Li Weishan
Three samples, LiNi 0.5 Mn 1.5 O 4 , LiNi 0.4 Mn 1.4 Co 0.2 O 4 , and LiNi 0.4 Mn 1.4 Cr 0.15 Co 0.05 O 4 , were prepared by sol–gel method and characterized by powder X-ray diffraction, Fourier transformed infrared spectroscope, scanning electron microscopy, Brunauer–Emmett–Teller surface area, four-probe resistance, cyclic voltammetry, electrochemical impedance spectroscopy, and charge–discharge test. It is found that the co-doped sample LiNi 0.4 Mn 1.4 Cr 0.15 Co 0.05 O 4 exhibits an improved performance compared with the Co-doped sample LiNi 0.4 Mn 1.4 Co 0.2 O 4 and the undoped sample LiNi 0.5 Mn 1.5 O 4 , especially at elevated temperature. At 25 °C, the discharge capacity of LiNi 0.4 Mn 1.4 Cr 0.15 Co 0.05 O 4 is 130 mAh g −1 at 0.1 C and 103 mAh g −1 at 10 C. At an elevated temperature (55 °C), its 1 C discharge capacity is 136 mAh g −1 and maintains 95.6 % of its initial capacity after 100 cycles. Compared with the reported results of LiNi 0.4 Mn 1.4 Co 0.2 O 4 and LiNi 0.475 Mn 1.475 Co 0.05 O 4 , the co-doped sample LiNi 0.4 Mn 1.4 Cr 0.15 Co 0.05 O 4 , with least content of Co, 0.05, possesses not only the high C-rate capacity but also the structural stability. The mechanism on the electrochemical performance improvement of LiNi 0.5 Mn 1.5 O 4 by the co-doping was discussed.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 29
·期 3
·1003-1011
·
IF 2.961
Jiang Guanghui,Liu Lei,Fei Zitong,Meng Qi,Zhang Yingjie,Dong Peng,Ouyang Quansheng,Ke Ding,Wang Jiqun,Yang Anqi
The large-scale lithium-ion batteries (LIBs) have begun to retire, and their disposal and reuse is a challenge. Herein, a regenerative and coating synergistic strategy is adopted to achieve the Li 3 PO 4 -coated and regeneration of LiNi 0.5 Co 0.2 Mn 0.3 O 2 material. The temperature was confirmed great influence to regenerate. The sample of 850 °C has the best cycle performance and rate performance, and the capacity retention rate is more than 80% after 100 cycles at 1 C. The recovery of material properties is due to structural repair and Li 3 PO 4 coating. The coating and regeneration strategy can be applied to the regeneration of other cathode materials and provides guidance for the treatment and reuse of waste LIBs electrolyte.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Cong Wang,Jieying Xiu,Kunxi Lü,Yafeng Li,Mingdeng Wei
Na super-ion conductor type material Na 3 V 2 (PO 4 ) 3 has been widely researched as the cathode of sodium-ion batteries (SIBs) in recent years, but the unsatisfying cost of Na 3 V 2 (PO 4 ) 3 impedes its wide application in SIBs. In this study, iron element is used to replace part of vanadium in Na 3 V 2 (PO 4 ) 3 to reduce its expense, and pine pollen is applied for the first time as a very effective carbon source to improve the performance of Na 4 FeV(PO 4 ) 3 . The fabricated composite material achieves a capacity of 105 mA h g −1 under 0.2 C and fascinating cycling stability over 94 % under 2 C for 500 cycles and 98 % under 10 C for 1000 cycles. The excellent cycle performance is caused by the involvement of pine pollen that acts as a carbon matrix to enhance the electron conductivity and block the agglomeration of active material effectively, thus the well-dispersed nano sized Na 4 FeV(PO 4 ) 3 shortens the diffusion path of sodium ion and gains a remarkable rate capability. Moreover, the distinguished reversibility during the charge and discharge procedures is ascribed also to the robust structure of Na 4 FeV(PO 4 ) 3 . This work provides an efficient route to realize the economic cathode material of SIBs with good performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 28
·16984-16990
·
IF 3.108
Jian-Min Zhu,Tian Xia,Kang-Kang Yan,Wei-Jui Chang,Xue-Gang Chen,Ying Ye,Ping-Ping Zhang
LiFePO4 is an effective battery material which has gained global focus. In this study, we prepared a novel Cu+-doped Li[Fe0.9Cu0.1Li0.1]PO4/C cathode material via a carbothermal reduction method using glucose as carbon source. X-ray diffraction (XRD) patterns and Rietveld refinement on the samples are consistent with the orthorhombic phase and showed that the substituting Cu+ ions and excess Li+ ions occupy the Fe sites. The micro-morphology of the samples indicates that Cu+ doping can decrease the particle size and maintain the crystal structure of LiFePO4/C. XP spectra confirmed that the surface oxidation states of Fe and Cu are +2 and +1, respectively. The as-prepared Li[Fe0.9Cu0.1Li0.1]PO4/C composite exhibits enhanced initial discharge capacity (148.8 mA h g−1) compared to the un-doped LiFePO4/C. The discharge capacity remains at 149.8 mA h g−1 after 50 cycles at a rate of 0.2C, which displayed an excellent cycling stability. Furthermore, the cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) results showed that the Cu+-doped LiFePO4/C composite exhibits a higher lithium-ion diffusion coefficient and lower charge transfer resistance than the undoped counterparts. This study presents a novel Cu+-doped LiFePO4/C cathode material with enhanced electrochemical properties, which could be potentially applied as a battery material.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 18
·8967-8977
·
IF 6.97
Li Li,Rui Zhao,Tinghua Xu,Dandan Wang,Du Pan,Kun Zhang,Caiyan Yu,Xia Lu,Guanjie He,Ying Bai
LiNi0.5Mn1.5O4 (LNMO) spinel has drawn increasing attention due to its high voltage, stabilized electrochemical performance and safety features as a cathode for lithium-ion batteries. However, the main challenge lies in its unstable surface structure, especially at elevated temperatures. In this paper, we decorate the LNMO precursor with a solid electrolyte of Li1.4Al0.4Ti1.6(PO4)3 (LATP) via a facile sol–gel method, followed by a co-crystallization process at 820 °C, to successfully generate a LATP modification shell at the surface of LNMO. The LATP modification shell could not only optimize the morphology of LNMO including the limitation of particle growth and control of crystalline orientation, but also realize ion doping during the co-crystallization process. By tuning the LATP contents, the 2 wt% LATP modification is found to be the most effective at balancing the interfacial stability and Li+ diffusion kinetics of LNMO, as well as enhancing its rate capability and capacity retention at high temperatures. As a result, the 2 wt% LATP-modified LNMO cathode exhibits a high reversible capacity of 84.8 mA h g−1 after 500 cycles with a capacity retention of 68.9%, and a superior rate capability (102.0 mA h g−1 at 20 C) at room temperature. Moreover, this electrode also delivers a good capacity retention of 85.7% after 100 cycles at 55 °C, which is ascribed to the stabilized interface with a LATP protective layer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenhui Tu,Zewei Chen,Yuanpeng Cao,Jianguo Duan,Jingjing He,Runlin Li,Peng Dong,Xianshu Wang,Yingjie Zhang,Ding Wang
Olivine-structured LiMnPO 4 -based cathodes have generated enormous development prospects due to their high energy density , good structural stability , and low cost. However, their scale of application is limited by high electronic and ionic insulativity. In this study, we designed and synthesized a bi-functional interfacial modified composite, 0.9LiMnPO 4 @0.1LiFePO 4 /C ( [email protected] /C ), using mechanochemical activation-assisted hydrothermal technology. The innovative Li-storage structure consists of a high-energy density LiMnPO 4 (LMP) core, a uniformly coated LiFePO 4 (LFP) layer with improved ionic conductivity as the secondary outer shell, and an in-situ coated carbon film with high conductivity as the outermost functional skin. As anticipated, the [email protected] /C composite exhibits outstanding Li-storage properties, demonstrating discharge capacities as high as 157.1 mAh g −1 and 146.7 mAh g −1 at 0.1 C and 1 C rates, respectively. Moreover, it exhibits an ultrahigh capacity retention of 92.5 % after 500 charge and discharge cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy & Environmental Science
·
2024
·Vol. 17
·期 11
·3807-3818
·
IF 32.4
Shenyang Xu,Zhefeng Chen,Wenguang Zhao,Wenju Ren,Chenxin Hou,Jiajie Liu,Wu Wang,Chong Yin,Xinghua Tan,Xiaobing Lou,Xiangming Yao,Zhihai Gao,Hao Liu,Lu Wang,Zuwei Yin,Bao Qiu,Bingwen Hu,Tianyi Li,Cheng Dong,Feng Pan,Mingjian Zhang
As commercial cathodes with the highest practical capacity, the structural nature of Li-rich Mn-based (LMR) cathodes, composite or solid solution, is still under debate. Due to the extreme structural similarity of two layered-phase components, namely, the monoclinic phase (C2/m) and rhombohedral phase (Rm), no single tool can resolve this concern alone. Herein, we combined multiple advanced techniques to comprehensively study the structural changes during synthesis of LMR cathodes from different aspects such as the elemental distribution, local structure, long-range structure, and short-range structure, revealing a clear process from the formation of two phases to the gradual phase fusion and eventually to a nearly solid solution. Particularly, X-ray pair distribution function (PDF) analysis combined with theoretical simulations reveals for the first time that the transition metal (TM)–TM distance increases with the progress of the phase fusion, which makes the short-range structural change in TM–TM atomic pairs an effective parameter for judging the extent of phase fusion. Eventually, excellent electrochemical performance was achieved by balancing capacity and cycling stability through adjusting the phase fusion to a medium extent in lithium and sodium two layered-phase components. This study establishes an approach to investigate the structural evolution in the complicated multiple-phase system and provides valuable insights into the design and optimization of cathodes by tuning the phase fusion extent.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Seokyoung Choi,Wuliang Feng,Zhongzhu Liu,Yongyao Xia
Spinel LiMn 1.5 Ni 0.5 O 4 (LMNO) is one of the promising cathode materials for the next generation Li-ion batteries due to its voltage platform. However, the dissolution of the transition metal at high voltage is the biggest obstacle that LMNO suffers from. In this study, we successfully suppressed transition metal dissolution in LMNO by the morphology control from regular octahedron to spherical. Niobium was integrated as a dopant, which restricted the growth of (1 1 1) crystal face, and increased the indices of crystal faces by homogenizing the surface energy. By changing to a smaller surface area with spherical morphology, the contact area with the electrolyte was reduced, thus suppressing the dissolution of the Mn ion. Consequently, the niobium-doped LMNO exhibited superior rate performance, capacity retention with 74.1% at 1C after 500 cycles in half-cell, and thermal stability compared to pristine LMNO.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）