JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2016
·Vol. 46
·期 7
·725-733
·
IF 2.223
Zhu Shaoyin,Yu Jiaojiao,Yan Xiao,Zhao Erqing,Wang Yanqing,Sun Deye,Jin Yongcheng,Kanamura Kiyoshi
Abstract A sulfur cathode with enhanced electrochemical properties is prepared by a hydrogel binder owning three-dimensional polymeric network for Li–S batteries. The promising high-performance binder (Alg-Ca 2+ ) is constructed by an in situ interconnection of alginate chains by additive divalent cation with a facile and self-assembly strategy. With the assistance of 3D network, the sulfur/activated carbon composite cathode exhibits a higher rate capability and cycling performance compared to poly(vinylidene fluoride) binder, and the capacity retention is up to 80.6 % after 200 cycles (0.5C, 1C = 1675 mA g −1 ). Additionally, the electrochemical impedance spectroscopy also reveals a lower electrode resistance and better kinetic characteristics with Alg-Ca 2+ as a binder. The improved electrochemical behaviors are assigned to the ability of maintaining the electrode stability due to the excellent mechanical property and amorphous structure. Graphical Abstract
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高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Bing Lu,Rong Du,Gang Wang,Yuwei Wang,Shuangshi Dong,Dandan Zhou,Shiyong Wang,Changping Li
With the penetration of lithium-ion batteries (LIBs) into electric vehicles, the recycling of waste LIBs is inevitable from the perspective of health, economy and environmental protection. Herein is reported a novel green method for extracting valuable metals from the cathode of LIBs, in which the Deep Eutectic Solvent (DES) is used as leachate to dissolve electrode material waste. Mixing choline chloride (ChCl) and malonic acid is helpful to effectively improve the reduction ability of DES, resulting in superior leaching efficiency. At the lower temperature (100 °C), the leaching efficiency of cobalt and lithium reached up to 98.61% and 98.78%, respectively. X-ray absorption near edge structure (XANES) spectroscopy demonstrated that DESs could act as both leachate and reducing agent, which could destroy the covalent bonds of metal oxides to form a cobalt (II)-chlorine complex. This method is straightforward to operate and does not involve the additional reducing agents, which is held promise to bring economic and sustainable development prospects in the field of lithium battery development.
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Small
·
2023
·Vol. 19
·期 23
·2300106
·
IF 13.3
Ziqin Liu,Xin Dong,Jing Wen,Pu Hu,Chaoqun Shang
The high reactivity of Li metal and the inhomogeneous Li deposition leads to the formation of Li dendrites and “dead” Li, which impedes the performance of Li metal batteries (LMBs) with high energy density. The regulating and guiding the Li dendrite nucleation is a desirable tactic to realize concentrated distribution of Li dendrites instead of completely inhibiting dendrite formation. Here, a Fe-Co-based Prussian blue analog with hollow and open framework (H-PBA) is employed to modify the commercial polypropylene separator (PP@H-PBA). This functional PP@H-PBA can guide the lithium dendrite growth to form uniform lithium deposition and activate the inactive Li. In details, the H-PBA with macroporous structure and open framework can induce the growth of lithium dendrites via space confinement, while the positive Fe/Co-sites lowered by polar cyanide (−CN) of PBA can reactivate the inactive Li. Thus, the Li|PP@H-PBA|Li symmetric cells exhibit long-term stability at 1 mA cm −2 for 1 mAh cm −2 over 500 h. And the Li-S batteries with PP@H-PBA deliver favorable cycling performance at 500 mA g −1 for 200 cycles.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liping Wu,Chuyue Cai,Xi Yu,Zihe Chen,Yuxin Hu,Fang Yu,Shengjun Zhai,Tao Mei,Li Yu,Xianbao Wang
Lithium sulfur batteries (LSBs) are regarded as one of the most promising energy storage devices due to the high theoretical capacity and energy density. However, the shuttling lithium polysulfides (LiPSs) from the cathode and the growing lithium dendrites on the anode limit the practical application of LSBs. To overcome these challenges, a novel three-dimensional (3D) honeycombed architecture consisting of a local interconnected Co3O4 successfully assembled into a scalable modified layer through mutual support, which is coated on commercial separators for high-performance LSBs. On the basis of the 3D honeycombed architecture, the modified separators not only suppress effectively the “shuttle effects” but also allow for fast lithium-ions transportation. Moreover, the theoretical calculations results exhibit that the collaboration of the exposed (111) and (220) crystal planes of Co3O4 is able to effectively anchor LiPSs. As expected, LSBs with 3D honeycombed Co3O4 modified separators present a reversible specific capacity with 1007 mAh g–1 over 100 cycles at 0.1 C. More importantly, a high reversible capacity of 808 mAh g–1 over 300 cycles even at 1 C is also acquired with the modified separators. Therefore, this proposed strategy of 3D honeycombed architecture Co3O4 modified separators will give a new route to rationally devise durable and efficient LSBs.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 62
·15479-15483
·
IF 5.236
Jingfang F. Zhou,Rukang K. Li
Graphical LiNaTiTa 2 P 2 O 13 displays an open framework comprised of staggered [Ti 1/3 Ta 2/3 O 3 ] ∞ layers and PO 4 tetrahedra with a herringbone-like stacking pattern, similar to monophosphate niobium bronzes. The existence of pentagonal tunnels, hosting the Li + and Na + ions, endow LiNaTiTa 2 P 2 O 13 a moderate ion transport capability (4.67×10 −4 S/cm at 823 K). In addition, the layers constituted by corner-sharing TiO6 and TaO6 octahedra endow a possibility as being photo-catalyst. The successful substitution of Nb for Ta results in the optical absorption red-shifted towards visible range with a narrowing band gap comparable to that of TiO 2 (3.2 eV). Herein, we report a detailed structural, electric, thermal and optical analysis of a titanium and tantalum phosphate LiNaTiTa 2 P 2 O 13 . The title compound is comprised of typical ReO 3 -type layers constituted by corner-sharing TiO 6 and TaO 6 octahedra, bridged by PO 4 tetrahedra, and the structure is closely related to monophosphate niobium bronzes. The existence of pentagonal tunnels, hosting the Li + and Na + ions, endows LiNaTiTa 2 P 2 O 13 a moderate ion transportation behavior (4.67×10 −4 S/cm at 823 K). In addition, the successful substitution of Nb for Ta in LiNaTiTa 2 P 2 O 13 results in the optical absorption red-shift towards visible range with a narrowing band gap, which may provide a route of isomorphic replacement to band engineering for photo-catalysis.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Wentao Lin,Jiapeng Liu,Lichun Xue,Yueqing Li,Haoze Yu,Yongqiang Xiong,Dengjie Chen,Francesco Ciucci,Jing Yu
Liquid organic electrolytes commonly employed in commercial Li-ion batteries suffer from safety issues such as flammability and explosions. Replacing liquid electrolytes with nonflammable electrolytes has become increasingly attractive in the development of safe, high-energy Li-metal batteries (LMBs). In this work, nonflammable, robust, and flexible composite polymer–polymer electrolytes (PPEs) were successfully fabricated by flame-retardant solution casting with polyimide (PI) and polyvinylidene fluoride (PVDF). The optimized nonflammable PPEs (e.g., PPE-50) demonstrate not only good mechanical properties (i.e., a high tensile strength of 29.6 MPa with an elongation at break of 87.2%), but also high Li salts dissolubility, the former of which ensures the suppression of Li dendrites, while the latter further improves the ionic conductivity (∼1.86 × 10 −4 S cm −1 at 30 °C). The resulting symmetric cells (Li|PPE-50|Li) offer excellent Li stripping and plating stability for 1000 h at 0.5 mA cm −2 /0.25 mAh cm −2 and 600 h at 2.0 mA cm −2 /1.0 mAh cm −2 . In addition, the LiFePO 4 |PPE-50|Li half cells show high cycling performance (e.g., a reversible discharge capacity of 135.9 mAh g −1 after 300 cycles at 1C) and rate capability (e.g., 117.2 mAh g −1 at 4C). The PPE-50 is also compatible with a high-voltage cathode (e.g., LiNi 0.5 Mn 0.3 Co 0.2 O 2 ), and the resulting batteries demonstrate long-term cycling stability with a high cut-off voltage of 4.5 V vs. Li/Li + . Because of the incorporation of a mechanically robust and thermally stable PI, a polar PVDF, and flame-retardant trimethyl phosphate (TMP) within PPEs, as well as the coordination between Li salts and TMP, and the interaction between Li salts and polymers (especially between Li bis(oxalato)borate) and PI, as well as the bis(oxalato)borate anion and PI), PPEs show great potential for practical and high-energy LMBs without safety concerns.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Guoqing Xu,Ping Liu,Yurong Ren,Xiaobing Huang,Zhiguang Peng,Yougen Tang,Haiyan Wang
The fabrication of an ideal electrode architecture consisting of robust three dimensional (3D) nanowire networks have gained special interest for energy storage applications owing to the integrated advantages of nanostructures and microstructures. In this work, 3D MoO 2 nanotextiles assembled from highly interconnected elongated nanowires are successfully prepared by a facile stirring assisted hydrothermal method and followed by an annealing process . In addition, a methylbenzene/water biphasic reaction system is involved in the hydrothermal process. When used as an anode material in Li ion batteries (LIBs), this robust MoO 2 nanotextiles exhibit a high reversible capacity (860.4 mAh g −1 at 300 mA g −1 ), excellent cycling performance (89% capacity retention after 160 cycles) and rate capability (577 mAh g −1 at 2000 mA g −1 ). Various synthetic factors to the fabrication of 3D nanotextiles structure are discussed here and this design of 3D network structures may be extended to the preparation of other functional nanomaterials .
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Nan Meng,Fang Lian,Yadi Li,Xiaofeng Zhao,Li Zhang,Shigang Lu,Hong Li
Electrolyte is the key to constructing the ionic transport paths and O2 gas diffusion routes in the cathode as well as maintaining the electrode interfacial stability in view of the complex chemistry of Li–O2 batteries. A novel poly(vinyl formal) (PVFM)-based Janus membrane, which is prepared via coating multiwalled carbon nanotubes (MWCNTs) on the porous side of the cross-linked PVFM membrane, has been proposed herein to achieve membrane-supporting gel polymer electrolyte (GPE) for Li–O2 batteries. Within Li–O2 batteries, the dense side of PVFM-based Janus membrane demonstrates a good compatibility with lithium metal anode, while the other side with MWCNTs coating reserves much more solvent on the surface, assisting the cathode to form enlarged electrolyte-wetted interface. Moreover, the comparative studies indicate that PVFM-based Janus membrane also can provide a conductive pathway, modulate the morphology of the discharge products, and produce accommodation space for the products. So, the Li–O2 batteries containing PVFM-based Janus membrane-supporting GPE not only demonstrate significantly improved discharge capacity and cycling stability, i.e., 150 times at 1000 mAh g–1 capacity limitation, but also a narrow voltage gap of 0.90 V and an excellent rate performance up to 1000 mA g–1.
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高影响因子
ACS Nano
·
2024
·
IF 15.8
Yuansheng Shi,Fushan Geng,Yang Sun,Pengfeng Jiang,Wang Hay Kan,Wei Tong,Xueyi Lu,Guoyu Qian,Nan Zhang,Bin Wei,Bingwen Hu,Dapeng Cao,Xia Lu
The irrational utilization of an anionic electron often accompanies structural degradation with an irreversible cation migration process upon cycling in sodium-layered oxide cathodes. Moreover, the insufficient understanding of the anionic redox involved cation migration makes the design strategies of high energy density electrodes even less effective. Herein, a P3-Na0.67Li0.2Fe0.2Mn0.6O2 (P3-NLFM) cathode is proposed with the in-plane disordered Li distribution after an in-depth remolding of the Li ribbon-ordered P3-Na0.6Li0.2Mn0.8O2 (P3-NLM) layered oxide. The disordered Li sublattice in the transition metal slab of P3-NLFM leads to the dispersed |O2p orbitals, the lowered charge transfer gap, and the suppressed phase transition at high voltages. Then the enhanced Mn–O interaction and electronic stability are disclosed by the crystal orbital Hamilton population (COHP) analysis at high voltage in P3-NLFM. Furthermore, ab initio molecular dynamics (AIMD) simulation suggests the order/disorder of the transition metal layer is highly correlated with the stability of the Li sublattice. The cross-layer migration and loss of Li in P3-NLM are suppressed in P3-NLFM to enable the high reversibility upon cycling. As a result, the P3-NLFM delivers a high capacity of 163 mAh g–1 without oxygen release and an enhanced capacity retention of 81.9% (vs 42.9% in P3-NLM) after 200 cycles, which constitutes a promising approach for sustainable oxygen redox in rechargeable batteries.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 7
·A1695
·
IF 3.259
Yanhua Zhang,Fei Chen,Dunjie Yang,Wenping Zha,Junyang Li,Qiang Shen,Xulong Zhang,Lianmeng Zhang
All-solid-state lithium batteries (ASLBs) have been dramatically attracted recently for its ability of solving the safety issues in traditional lithium ion batteries using liquid electrolyte. However the poor Li+ transportation between the active material particles in the cathode greatly deteriorate the specific capacity of ASLBs. Herein, we design a composite cathode composed of polyethylene oxide (PEO) and LiCoO2 (LCO) in which a three-dimensional (3D) continuous Li+ conductive network forms. With the decrease of the LCO: PEO ratio, the 3D Li+ conductive network gradually becomes continuous, and the corresponding discharge capacity increase from 50 to 136 mAh g−1. At LCO: PEO = 6:1 and 4:1, the corresponding ASLBs has a very high discharge capacity of 136 and 124 mAh g−1, respectively, representing approximately 98% and 90% of the theoretical discharge capacity. The capacity retention after 5 cycles is 97%∼98% of the 2nd cycle, which confirms stable cycle performance of the battery. The FTIR results show that, in the composite cathode, the LCO particles transport Li+ cations by coordinating CO functional group in PEO chains. Compared with other optimized ASLBs based on LLZO solid elctrolyte, our battery has higher specific capacity while being tested under the highest current rate.
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高影响因子
Nano Energy
·
2013
·Vol. 2
·期 6
·1128-1136
·
IF 0
Shuaixing Jin,Na Li,Hao Cui,Chengxin Wang
Germanium oxide is a promising anode material for lithium ion batteries due to its theoretical capacity (1100 mAh/g) is 3 times higher than the commercial graphite anode (only 372 mAh/g). However, so far only a few studies have reported the application of germanium oxide in LIBs and the cycling performance is unsatisfactory. In this report, we have prepared a unique VAG@ amorphous GeO x sandwich nanostructure by a non-toxic, low temperature CVD method with vertically aligned graphene(VAG) as templates. The graphene sheets form a fast electron transport channel duo to its superior electron conductivity and the vertically aligned sandwich nanoflakes can offer a short pathway for lithium ion thanks to the unified orientation. Additionally, the GeO x sediments that evenly distribute on the surface of graphene flakes have an amorphous structure and their thickness is less than 10 nm, which can mitigate the mechanical stress generating in the lithiation/delithiation process. Owing to these advantages, the as-prepared anode shows a stable capacity of 1008 mAh/g for 100 cycles (with capacity retention of 96%). Rate performance reveals the anode can maintain a capacity of 545 mAh/g even at the rate of 15C. Our results are demonstrated to be so far the most stable performance for germanium oxide anodes.
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Energy Materials
·
2024
·Vol. 4
·期 3
·N
·
IF 11.8
Zihao Wang,Tao Chen,Zhicui Song,Jianxiong Xing,Aijun Zhou,Jingze Li
Integrating metallic lithium (Li) with a three-dimensional (3D) host is a popular strategy for long-life Li composite anodes, where the structure and physicochemical nature of the framework are critical for the electrochemical performance. Herein, Li-rich dual-phase barium (Ba)-based alloy composed of BaLi4 intermetallic compounds and Li metal phases is thermally incorporated into commercial carbon cloth sheets to develop Li-Ba alloy composite (LBAC) anodes featuring a porous array of BaLi4 microchannels as the built-in 3D skeleton. Doping of metallic Ba can greatly lower the surface tension of liquid Li and improve the wettability of the molten Li-Ba alloy toward the carbon cloth substrate. Moreover, LBAC benefits from the superior lithiophilicity and the porous architecture of BaLi4 skeleton nested in a conductive carbon fiber matrix, leading to stable cycling performance by confining Li stripping/plating in microchannels network of BaLi4 alloy framework and dissipating high current densities. As a result, the LBAC symmetrical cells can run stably for 1,000 h under 1 mA cm-2 and 1 mA h cm-2, and the capacity retention can retain 93.3% after 300 cycles in the full cell with areal capacity of 2.45 mA h cm-2. This work offers a smart designing strategy of 3D Li alloy composite anodes by introducing porous and lithiophilic alloy scaffold as sub-framework of the carbon hosting anode, promising the prospect of Li metal batteries for future applications.
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高影响因子
危险品化学品经营许可证（带存储）